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71-560: The AR-7 was designed by American firearms designer Eugene Stoner , who is most associated with the development of the ArmaLite AR-15 rifle that was adopted by the US military as the M16 . The civilian AR-7's intended markets today are backpackers and other recreational users as a takedown utility rifle. The AR-7 is intended for users of recreational vehicles (automobile, airplane, or boat) who might need

142-412: A ballistic table ). The latter is particularly relevant at very close ranges (e.g. 15 meters [49 feet]), while at longer distances, such as in long range shooting , the scope height has less impact on the ballistic calculations. The height of a scope sight can be measured in many ways. With regard to ballistic calculations, it is generally only measured from the center of the bore axis to the center of

213-428: A direct impingement system, but it does not utilize a conventional direct impingement system. In U.S. patent 2,951,424 , the designer states: ″This invention is a true expanding gas system instead of the conventional impinging gas system.″ Gas is routed from a port in the barrel through a gas tube, directly to a chamber inside the bolt carrier. The bolt within the bolt carrier is fitted with piston rings to contain

284-702: A 3/8" rail. The base attached by the receiver side plate screw (the Charter Arms side plate screw is longer than that of the ArmaLite). This base can be used on the ArmaLite and the Charter Arms Explorer rifles and the Charter Arms Explorer II pistol. However, with the base in place, the rifle receiver will no longer fit the recess in the stock for storage. (The B Square Charter Arms AR-7 base is not needed on

355-509: A base attached to the firearm and rings (usually two) attached to the sight. The rings are usually made of steel or aluminum. Common diameters on ring mounts are 25.4 mm (1 inch), 26 mm, 30 mm and 34 mm. There are big differences in the strength and ability of sustained precision on different assemblies. With weak cartridges such as .22 LR applied in light-use scenarios, a pair of skinny aluminium rings may work well, while firearms with very powerful recoil often combined with

426-421: A complete scope mount assembly, but is most often used to refer to the lower part of a two-part scope mount assembly. The firearm interface which sits on the firearm and to which the scope mount is attached is often called the base or rail . Some types of bases are: On receivers without an integrated attachment for mounting a scope, for example, an integrated Picatinny rail, the base is usually screwed on as

497-486: A cost greater than the rifle itself. Such accessories often make it impossible to use the original floating stock for storage of modified parts. The current Henry U.S. Survival AR-7 has a 3/8" scope sight rail integral with the receiver to accept standard Weaver-style "Tip-Off" rings. For earlier makes, B Square supplied the Charter Arms AR-7 Explorer Scope Mount Base, an accessory bracket with

568-486: A heavy sight may require steel rings or thicker aluminum rings with recoil lugs to be used. Scopes for ring mounts are available in many different sizes. The most common ones are: Some less common standards are: For a ring assembly to grip evenly, it is important that the scope rings are circular and coaxial with the scope tube. On ring mounts that grip unevenly, the ring mount can be lapped to prevent uneven pressure when mounting. One scopes made for ring mounts, it

639-446: A longer distance between the front and rear screw holes, and therefore continuous scope mount assemblies for the 700 LA do not fit on the 700 SA nor the above-mentioned firearms. However, two-piece scope mounts in general interchange for the mentioned models. Bases with a rounded bottom for mounting on a round receiver bridges should ideally have a slightly smaller radius than the receiver in order to provide two points of contact and give

710-456: A magazine in place and the rifle is normally sold with two magazines. The latest versions of the Henry allow for storage of three magazines total, with two in the stock recess, and one in the receiver. The modern Henry U.S. Survival Rifle floats on water for a while either assembled or stored, although it is not entirely waterproof and will sink eventually. The rifles now include a full Teflon coating on

781-419: A notch in the receiver. The rifle receiver notch and barrel lug are on top; the pistol notch and lug are broader and on the bottom. If a Charter Arms factory-made pistol barrel were installed on a rifle, the extractor on the bolt would be opposite the extractor slot in the barrel, preventing the bolt from closing (plus the front sight would be upside down). Modifying the pistol barrel to fit the rifle, or modifying

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852-571: A piston-operated gas impingement system patented as US PAT No. 2,951,424 and granted in September 1960. Once again, Robert Fremont and Jim Sullivan took a Stoner rifle and redesigned it for the .223 Remington cartridge, to create the Stoner ;63 Weapons System. Stoner then worked with TRW by designing the TRW 6425 25 mm Bushmaster auto cannon, which was later manufactured by Oerlikon -Bührle as

923-407: A radius on the front bridge and a flat on the rear bridge. Quick release (QR) can refer to several different variants of scope mounts which can be mounted and disassembled quickly without tools. In some cases, it may be relevant to add extra inclination to the scope to be able to shoot at longer (or shorter) distance. For example, this is popular for long range shooting , where it is common to use

994-561: A separate part. Such mounts are often model-specific to the firearm, and depend on factors such as the radius of the receiver bridge, the type of screw and the distance between the screw holes. A common fastening method is by screws. These are often metric M3.5x0.6 mm or US #6–48 (⌀ 3.5 mm, 0.53 mm pitch) or #8–40 (⌀ 4.2 mm, 0.64 mm pitch). Many European assemblies use M3.5 screws, such as SAKO Optilock, Recknagel and original CZ rings. Since #6–48 and M3.5x0.6 have near identical diameters and almost equal pitch , there

1065-622: A stable attachment. Conversely, a slightly too large radius on the mount will result in just one point of contact and a less stable attachment. In the table below, the radius refers to the curvature of the mounting surface on the receiver bridge. The base is often attached with two screws on the front receiver bridge and two screws on the rear receiver bridge, but sometimes with several more screws. The hole distances are measured from center-to-center. Some common hole distances are 12.7, 15.37 and 21.84 mm (0.500, 0.605 and 0.860 in) respectively). The two front screws are referred to in

1136-456: A tendency to warp. Other sources state that the first production at Charter had problems which were corrected in later production runs. (Summary of information available in The Blue Book of Gun Values) Original ArmaLite barrels had a steel liner in an aluminum shell. The stock was a foam filled plastic shell with internal recesses for the receiver, barrel and one magazine and did not accept

1207-414: A tilt of 6  mrad (20 MOA ). Extra tilt can be achieved several ways, like for example with a tilted Picatiny rail (e.g. 6 mrad tilt), with bases or rings (e.g. 6 mrad tilt) or with special insert rings (e.g. Burris Pos-Align). The height of scope sight can be important for the cheek rest support (often called cheek weld ) to gain correct eye placement, as well as for calculating ballistics (e.g.

1278-414: A very symmetric design that allows straight line movement of the operating components. This allows recoil forces to drive straight to the rear. Instead of connecting or other mechanical parts driving the system, high pressure gas performs this function, reducing the weight of moving parts and the rifle as a whole. The straight-line recoil design, where the recoil spring is located in the stock directly behind

1349-573: A weapon for foraging or defense in a wilderness emergency. The prototype of what would become the AR-7 was designed by Eugene Stoner at ArmaLite Inc., a division of Fairchild Aircraft . The rifle shares some of the features of the bolt-action AR-5 , another takedown rifle designed by Stoner for ArmaLite and adopted by the United States Air Force in 1956 as the MA-1. The MA-1 was intended to replace

1420-585: Is a light firearm with a heavy bolt and twin recoil springs. The fact that both the barrel and stock are detachable has led to a plethora of after-market accessories, similar to those available for the Ruger 10/22 . Barrels, stocks, and grips, of varying finishes and utility, can be added to the rifle. These include collapsible stocks, wire-framed stocks, pistol grips, flash suppressors, shrouded barrels, high-capacity magazines, telescopic sights, reflex 'red dot' sights and other occasionally fanciful-looking hardware, some at

1491-474: Is a potential for confusion, and upon mixing the wrong screw will enter the threads, but will gradually become tighter to screw until the thread is destroyed. In case of damage, the hole must often be drilled and re-threaded, and M4x0.7 or #8–40 may then be relevant alternatives. The Remington 700 Short Action (SA) scope base attachment pattern is particularly widespread, and is for example used on models such as: The Remington 700 Long Action (LA) naturally has

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1562-473: Is constructed primarily of aluminum, with plastic for the stock, buttcap, and recoil spring guide. The bolt is steel. The original barrel was aluminum using a rifled steel liner; barrels of some production models have used all steel barrels, others have used barrels made of composite materials. The AR-7 measures 35 inches (89 cm) overall when assembled. It disassembles to four sections ( barrel , action , stock , and magazine ), with three parts storing inside

1633-528: Is not uncommon to get ring marks when mounting the rings. There are insert rings on the market which allows for mounting a scope inside a ring mount of a larger diameter. An example could be to mount a scope with a 1-inch (25.4 mm) tube in a 30 mm mount using a plastic insert. There are also special ring mounts in the market with circularly shaped ring inserts made to provide stress free mounting without lapping, with Burris Signature Rings and Sako Optilock Rings as two well-known examples. Burris Signature

1704-444: Is possible to manually load a single round into the firing chamber, allowing use of flat-nosed bullets or low-velocity or subsonic ammunition. The barrel takedown nut tends to loosen during firing and may need hand-tightening to maintain both accuracy and reliability. ArmaLite sold the design to Charter Arms in 1973. According to some accounts posted by enthusiasts, this is when quality began to deteriorate. Barrels were said to have

1775-399: Is sufficient for hunting small game at ranges to 50 yards (46 m). Reliability of the AR-7 is highly dependent on the condition of the magazine and on the ammunition used, perhaps more so than with other models of semi-automatic .22 caliber rifles. The feed ramp is part of the magazine and is subject to damage from mishandling. Flat-nosed bullets tend to jam on the edge of the chamber of

1846-424: Is usually meant an interconnecting part between the scope and the firearm. For example, a base may have a picatinny attachment on the underside, while the upper side may have either a ring (e.g. 30 mm) or rail mounting (e.g. Zeiss rail). On some assemblies, the upper and lower parts of the base are separate parts that must be screwed together and fastened to a specified torque. A base can thus sometimes constitute

1917-468: The de facto industry standard for scope mounting rails. The system has so far seen most use on the European high end market. The Swarovski SR rail (patented in 2002, introduced in 2005 The Swarovski SR rail is also used by Kahles, a Swarovski subsidiary. ) has a flat rail with many "teeth" as recoil lugs, and is only offered on scopes from Swarovski and its subsidiary Kahles. It separates itself from

1988-535: The Broomhandle Mauser (as "Bolomauser"), Thompson submachine gun (as "T-62 Civilian Defense Model") and M1 Carbine made on AR-7 receivers and barrels. The Charter Arms AR-7 Explorer rifle replicated the ArmaLite AR-7 Explorer with variations in finish. Explorer II was a pistol version of the AR-7. It resembled a Broomhandle Mauser . The receiver had a built-in pistol grip with no provision for

2059-593: The Lockheed Martin Corporation ). During World War II , he enlisted for Aviation Ordnance in the U.S. Marine Corps and served in the South Pacific and northern China . In the Corps, he had his first experience of working with heavy-caliber automatic weapons as an armourer. The work experience and combat training served him throughout his weapons designing career. In late 1945 Stoner began working in

2130-675: The M4 Survival Rifle and the M6 Aircrew Survival Weapon which was a superposed ("over-under") twin-barrel rifle/shotgun chambered in .22 Hornet and .410 bore , using a break-open action. The AR-5 had the advantage of repeat fire over the then-standard M6, using the same .22 Hornet cartridge. When the AR-5 was adopted as the MA-1 but was not placed in issue due to the number of usable M4 and M6 survival weapons in USAF inventory, ArmaLite used

2201-757: The Oerlikon KBA 25mm. He co-founded ARES Incorporated of Port Clinton, Ohio , in 1972, but left the company in 1989, after designing the Ares Light Machine Gun , sometimes known as the Stoner 86 . It was an evolved version of the Stoner 63. At Ares, he also designed the Future Assault Rifle Concept (FARC). In 1990, he joined Knight's Armament Company (KAC) to create the Stoner Rifle-25 ( SR-25 ), which currently sees military service as

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2272-768: The United States Navy Mark ;11 Mod 0 Sniper Weapon System . While at KAC, he also worked on yet another version of the Stoner Weapons System, called the Stoner 96. Among his last designs were the SR-50 rifle and the Colt 2000 . On May 16, 1990, Stoner and Mikhail Kalashnikov , inventor of the AK-47 and its derivatives, met for the first time. They spent the next few days talking, sharing stories, shopping, going out to dinner and touring Washington D.C. They visited

2343-408: The barrel or stock ). Since the mid-20th century, dovetail rails , where the mount is slided over a straight dovetail bracket with an inverted isosceles trapezoid cross-section and fixed tight in position with clamping screws, became more common due to the ease of installation and removal. Later, the hexagonally cross-sectioned rail interface systems such as Weaver rail became popular and

2414-472: The machine shop for Whittaker, an aircraft equipment company, and ultimately became a Design Engineer. In 1954 he came to work as chief engineer for ArmaLite , a division of Fairchild Engine & Airplane Corporation . While at ArmaLite, he designed a series of prototype small arms, including the AR-3, AR-9, AR-11, and AR-12, none of which saw significant production. Their only real success during this period

2485-514: The 9mm Beretta 1951 8-shot handgun. The Israelis further modified these rifles, adding a telescoping stock, a pistol grip from a FAL-type rifle , shortening the barrel (to 13.5 inches (340 mm)), and adding a front sight based on the K98k Mauser. The shoulder stock held two magazines, with a third magazine in the receiver, plus forty rounds of ammunition stored inside the pistol grip. After Israeli service, some of these rifles were re-imported into

2556-574: The AR-10 in favor of the more conventional T44, which became the  M14 . The AR-10's design was later licensed to the Dutch firm of Artillerie Inrichtingen, which produced the AR-10 until 1960 for sale to various military forces. At the request of the U.S. military, Stoner's chief assistant, Robert Fremont along with Jim Sullivan designed the Armalite AR-15 from the basic AR-10 model, scaling it down to fire

2627-415: The AR-7, 2.5 pounds, a proper length of parachute cord with a slip knot at either end can be used as a sling or lanyard . Eugene Stoner Eugene Morrison Stoner (November 22, 1922 – April 24, 1997) was an American machinist and firearms designer who is most associated with the development of the ArmaLite AR-15 rifle that was redesigned and modified by Colt's Patent Firearm Company for

2698-412: The Henry version and will not fit the Henry receiver.) Apart from the highly modified AR-7 Israeli survival rifles, most AR-7 models lack provision for a carry sling. AR-7 owners have adapted slings designed for use on guns without modification, such as universal shotgun slings designed to cup the shotgun buttstock at the rear and clamp to the barrel or magazine tube at the front. Given the light weight of

2769-688: The Smithsonian Institution, the NRA's National Firearms Museum, and a hunting lodge owned by the gun club at Star Tannery, where they went shooting. They also visited the Marine Corps base in Quantico, Virginia, where they watched new weapons being tested. During this short visit, both men, intimately familiar with the other's work, shared a common bond and became friends, "not needing an interpreter to get their thoughts across." Eugene Stoner died of cancer at

2840-473: The U.S. by Bricklee Trading Company for sale on the civilian market. The barrels are marked with the BTC identification as required by U.S. law on imported guns. The Israeli version commands a premium among collectors. In order to comply with U.S. Federal law on minimum rifle barrel length of 16", a 3-inch muzzle brake was permanently attached. The AR-7 functions as a simple or plain blowback semi-automatic. The AR-7

2911-577: The United States military as the M16 rifle . Stoner was born in Gosport, Indiana , on November 22, 1922. He moved to Long Beach, California where he graduated from Long Beach Polytechnical High School . In 1939, after the Depression, there was not enough money for him to attend college, so he went to work as a machinist for Vega Aircraft Company , the forerunner of what became Lockheed Airplane Company (now

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2982-500: The Zeiss rail in that it is not neither stepless nor self-centering. A former competing standard was the halv-circle shaped Schmidt & Bender Convex rail also introduced in 2005. Schmidt & Bender after a few years changed to the Zeiss rail standard. In contrast to the Zeiss and Swarovski systems, the S&;B Convex rail had the possibility to add a cant to the scope when mounting, such that

3053-514: The action, and serves the dual function of operating spring and recoil buffer. In 1955, Stoner completed initial design work on the revolutionary ArmaLite AR-10 , a lightweight (3.29 kg (7.25 lb)) select-fire infantry rifle in 7.62×51mm NATO caliber. Besides featuring the Stoner bolt and carrier piston system, the AR-10 stock was in line with the bore to reduce muzzle rise, especially during automatic fire. Because recoil does not significantly shift

3124-578: The age of 74 on April 24, 1997, and was interred in the Quantico National Cemetery , Quantico, Virginia. He was survived by his wife, Barbara Hitt Stoner, whom he married in 1965; his first wife, Jean Stoner Mahony of Newport Beach, California , from whom he was divorced in 1962; four children from his first marriage, seven grandchildren and four great-grandchildren. Barbara Hitt Stoner died at her home in Plymouth, Michigan on February 17, 2022, and

3195-400: The barrel. The transition of the cartridge from magazine to barrel can be smoothed by minor beveling of the chamber of the barrel, by using round-nosed as opposed to flat-nosed bullets, and by paying attention to the condition of the feed lips and feed ramp of the magazine. Later production magazines include an external wire spring to align the cartridge; earlier magazines used two pinch marks at

3266-432: The bolt carrier, the gas is funneled inside the bolt carrier wherein the increase in pressure results in the bolt itself acting as a piston, forcing the bolt carrier away from the barrel face. The Stoner bolt and carrier piston system is ammunition specific, since it does not have an adjustable gas port or valve to adjust the weapon to various propellant and projectile or barrel length specific pressure behavior. It provides

3337-401: The design and production rights passed on to Henry Repeating Arms and the compact rifle was slightly revised, resulting in improved reliability and durability. The AR-7 is now (2018) known as the Henry U.S. Survival AR-7 rifle. An ABS material replaced the original stock plastic, which was prone to cracking and failure. The receiver recess in the Henry stock allows storage of the receiver with

3408-399: The gas. In effect, the bolt and carrier act as a gas piston and cylinder. The subtleties involved in ArmaLite's patent on the gas system significantly diverge from classical direct impingement; upon firing, the pressurized propellant gasses exit the barrel via the gas port and travel the length of the gas tube, but instead of simply applying the inertia necessary to cycle the weapon directly to

3479-508: The grip. The most common barrel was six inches (150 mm). Optional barrel lengths included eight inches (200 mm) and ten inches (250 mm). Because the U.S. 1934 NFA regulations set the minimum rifle barrel length at 16 inches (410 mm), Charter Arms made the barrels of the Explorer I rifle and Explorer II pistol non-interchangeable to prevent installing the pistol barrel on the rifle. The AR-7 barrel has an alignment lug that mates

3550-450: The list below as screws 1 and 2, and the front hole spacing is thus referred to as «distance 1–2». In the same way, the rear hole distance is called «distance 3–4». The distance between these is largely determined by the receiver length, and is stated here as «distance 2–3» *The radius is similar, but the screw types used vary 0–13.2 mm *Newer models have a radius on both the front and rear receiver bridges, while older models have

3621-478: The outer surface. Henry added a 3 ⁄ 8 inch (9.5 mm) Dovetail rail (aka Weaver .22 Tip-Off Mount rail) on the top of the receiver for attaching a wide variety of optics. Henry introduced a 5-round magazine for jurisdictions that limit magazine capacity for hunting wild game. Another variant was made by ArmaLite and sold to the Israeli Military for use as pilot/aircrew survival weapons, replacing

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3692-440: The plastic stock, measuring 16 inches (41 cm) long. The rifle weighs 2.5 pounds (1.1 kg), light enough for convenient backpacking. The rear sight is a peep sight , which comes on a flat metal blade with an aperture (in later production two different size apertures available by removing and flipping the rear sight), and is adjustable for elevation (up-down). The front sight is adjustable for windage (side-to-side). Accuracy

3763-464: The point of aim, faster follow-up shots are possible, and user fatigue is reduced. The AR-10 was submitted for rifle evaluation trials to the US Army's Aberdeen Proving Ground late in 1956. In comparison with competing rifle designs previously submitted for evaluation, the AR-10 was smaller, easier to fire in automatic, and much lighter. However, it arrived very late in the testing cycle, and the army rejected

3834-693: The receiver with a magazine in place. The original ArmaLite stock retained buoyancy longer than some later stocks by other makers. The receiver did not provide for a scope mount . The rear sight was a peep aperture, adjustable for elevation. The front sight was drift-adjustable for windage. The AR-7 was also manufactured in Argentina as the Sistema de Armas .22 LR Fire de Brenta . It came with various barrel lengths, shrouds and fixed rifle stocks as well as pistol grips with retractable stocks. Herter's, Hy Hunter and American International Distributors marketed .22 replicas of

3905-470: The research and tooling for the AR-5 in developing the AR-7 for the civilian market. The AR-7 uses a blowback semi-automatic action in .22 Long Rifle but retains the AR-5/MA-1 feature of storing the disassembled parts within the hollow stock, which is filled with plastic foam and capable of floating. Like the bolt-action AR-5, the AR-7 was designed as a survival rifle for foraging small game for food. The AR-7

3976-481: The reticle is not horizontal to the ground. There is an older European system with an upside-down V-shape (70 degrees). This system has little widespread use today. The advantage of this system was that it at one time was offered by most European scope manufacturers, but the disadvantage was that the rail had to be drilled for a screw each time the eye relief was to be adjusted. All new standards for rail mounts have addressed this issue. Ring mounts usually consist of

4047-532: The rifle receiver to accept the pistol barrel, would be "making a short barrel rifle" legally requiring federal registration on an ATF Form 1 with payment of a $ 200.00 tax. Conversely, after the Supreme Court ruling in United States v. Thompson/Center Arms Co. , modifying the pistol to accept the rifle barrel and/or stock, or modifying the rifle barrel or stock to fit the pistol is legal so long as you do not have

4118-401: The rifle stock (the internal parts are interchangeable between rifle and pistol). The rear sight of the pistol was an open notch adjustable for windage and elevation. The Explorer II front sight was integral with the barrel shell and was not adjustable. The magazine well in front of the trigger guard would accept any magazine designed for the rifle. A spare 8-round magazine could be carried inside

4189-482: The rifle stock attached at the same time as the pistol barrel. It is legal (as a pistol) to have the rifle barrel attached with the pistol grip; there is no federal maximum pistol barrel length. In the United Kingdom this rifle is a Section 1 Firearm requiring a Firearms Certificate to buy or acquire. AR-7 Industries made solid steel barrels much heavier than the AR-7 barrels by ArmaLite, Charter or Henry. In 1980,

4260-646: The rings with the circular insertes was considered to have expired in 2014, and as of 2020 is listed as "definitely expired". In 2015, XTR Signature Rings was launched as a further development of the Burris Signature series. The XTR variant differs in that it has two circular cavities per ring assembly versus one. A patent for the XTR Signature Rings was applied for in 2016, and was granted to Burris in 2019. Many reflex sights (e.g. red dot sights) and holographic sights have proprietary mounts. By bases,

4331-404: The scope sight ( sightline ). With regard to cheek support, several methods are used: On firearms with a picatinny rail, the height is measured from the top of the picatinny rail on the firearm. On most other types of bases it is common to measure from the top radius of the receiver bridge. When the bottom measuring point is determined, the height is then measured up to either the optical center or

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4402-537: The section on Link between scope and firearm ). Scope mounts may be offered by firearm and scope manufacturers, or bought as aftermarket accessories. Among scopes for rail mounts, the 22.5-degree V-shaped Zeiss rail is the most prevalent standard. It was introduced in 1990. After the patent expired in 2008, compatible scopes have been offered from manufacturers such as Blaser , Leica , Minox , Meopta , Nikon , Noblex (formerly Docter ), Schmidt & Bender and Steiner . It has therefore, in some sense, become

4473-645: The small-caliber .223 Remington cartridge. The AR-15 was later adopted by United States military forces as the M16 rifle . After ArmaLite sold the rights to the AR-15 to the Colt Firearms Company, Stoner turned his attention to the AR-16 design. This was another advanced 7.62 mm rifle but used a more conventional short-stroke piston and a number of stamped parts to reduce cost. This weapon saw only prototype development, but adaptation to .223 Remington resulted in

4544-514: The somewhat successful and often imitated Armalite AR-18 . Stoner left ArmaLite in 1961 to serve as a consultant for Colt . He eventually accepted a position with Cadillac Gage where he designed the Stoner ;63 Weapons System . This was a modular weapons system which could be reconfigured to be a standard automatic rifle , a light machine gun , a medium machine gun , or a solenoid -fired fixed machine gun. The Stoner Weapons System used

4615-424: The top of the magazine body, which in use could become sprung open or worn. All iterations of the AR-7 from the ArmaLite to the Henry U.S. Survival rifle use a bolt and dual recoil springs that are heavy compared to most other .22 semiautomatics. The AR-7 requires high-velocity ammunition for reliable functioning. The manufacturers recommend use of 40-grain (2.6 g) round nose bullets in high-velocity loadings. It

4686-467: The use of torque screwdrivers ), but sometimes they are manually tightened via thumbscrews , and may even have Quick Release (QR) designs. As of 2020, the Picatinny rail is arguably the most widespread scope mounting standard for new firearms, although there are many proprietary and brand-specific types of mounts that can either be used with Picatinny rails, or as completely different design alternatives (see

4757-435: The weapon. Words such as mounts and bases are used somewhat loosely, and can refer to several different parts which are either used together or in place of each other as ways to mount optical sights to firearms. Attachment interfaces for scope mounts vary according to weapon design and user choice. Traditionally scope mounts are fastened onto firearms via tapped screw holes (usually on the receiver ) and/or clamps (onto

4828-507: Was interred with her husband. Scope mount Scope mounts are rigid implements used to attach (typically) a telescopic sight or other types of optical sights onto a firearm . The mount can be made integral to the scope body (such as the Zeiss rail ) or, more commonly, an external fitting that clamp onto the scope tube via screw -tightened rings (similar to pipe shoes ). The scope and mount are then fastened onto compatible interfaces on

4899-492: Was introduced in 1995. A patent was applied for in 1994, and was granted in 1995. Sako Optilock has been sold since some time in the early 2000s. The trade name Optilock was registered in the US in December 1997, and has been marketed in the US since December 2001. In 2000, Sako was sold to Beretta Holding . In 2002, Burris was also sold to Beretta Holding, and thus Burris and Sako got the same owners. Burris' original patent for

4970-645: Was later modified into the Picatinny rail in the early 1990s, which became the standardized military-use mounting interface for NATO troops in 1995. The Picatinny rail was officially replaced by the metrified NATO Accessory Rail for military use in 2009, although it remained popular in the civilian market for both scope and accessory mounting. Scope mounts can be either one-piece (a single implement with multiple clamping rings) or multi-piece (usually two or more individual scope rings). These mounts are usually fastened with screws to specified tensions (which warrants

5041-494: Was the AR-5 survival rifle, which was adopted by the United States Air Force . The Stoner bolt and carrier piston system is a widely known gas system designed by Eugene Stoner. The patent for the gas operated bolt and carrier system was filed in 1956 by ArmaLite for use in the AR-10 , which was later developed into the ArmaLite AR-15 , M16 rifle and M4 carbine . It is commonly called

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