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The Ruger AR-556 is a semiautomatic AR-15 style rifle manufactured by U.S. firearms company Sturm, Ruger & Co. Introduced in 2014 as an entry-level AR-15 using a direct impingement action, with variants since being released such as the upgraded AR-556 MPR (multi-purpose rifle) in 2017 [1] and the AR-556 pistol in 2019.
The barrel is threaded to fit the Ruger action threads. This way, a competent gunsmith only needs an AR-15 barrel wrench and proper headspace gauges to fit a new barrel. [14] This eliminates the need for machining by the gunsmith as with traditional barrel mounting solutions. [citation needed]
The SR-556 is a semi-automatic AR-15 style rifle manufactured by Sturm, Ruger & Co. The rifle was introduced in 2009 in .223 Remington/5.56×45mm NATO and as a .308 Winchester AR-10 variant in 2013, the SR-762. [4] It is one of several AR-15 rifles to use a gas piston operation.
.223 Remington – Original AR-15 cartridge: .223 cartridges may function in a 5.56×45mm rifle, however 5.56×45mm cartridges may produce excessive pressure in a .223 Rem rifle. On the other hand, a .223 Wylde chamber is used on .223 Rem rifle barrels to allow them to safely fire either .223 Remington or 5.56×45mm NATO ammunition. [6]
Ruger announced on October 17, 2013 on the SR-762 being produced. [ 3 ] By 2018, Ruger had discontinued the SR-762 (along with all of the SR-556 models), as the AR-556 began replacing all SR-556 rifles.
ArmaLite, or Armalite, is an American small arms engineering company, formed in the early 1950s, in Hollywood, California.Many of its products, as conceived by chief designer Eugene Stoner, relied on unique foam-filled fiberglass butt/stock furniture, and a composite barrel using a steel liner inside an aluminum sleeve, including the iconic AR-15/M16 family.
It is the first model of the Ruger SR-series. The full-size Ruger SR9 is chambered in 9×19mm Parabellum, and it is shipped with two 17-round, flush-fit magazines and a loading tool. An economy version of the SR9, the 9E, was released in 2014. The Ruger SR9c started to ship in January 2010, according to Ruger. [12]
The Ruger American Rifle is the first to use the trademarked "Ruger Marksman Adjustable™" trigger, which is similar in design to the Savage "AccuTrigger" and allows the user to adjust the weight of pull between 3–5 lb (1.4–2.3 kg) by means of turning a set screw on the trigger housing. [2]