Ruger SR-556
The SR-556 is a semi-automatic rifle carbine manufactured by U.S. firearms company Sturm, Ruger & Company, Inc. The rifle was introduced in 2009, marking Ruger's entry into the popular AR-15 market.[1] It is one of several new AR-15 platform rifles to utilize gas piston operation.
Overview
The rifle features a patent-pending, "two stage" piston mechanism as opposed to the standard AR-15 direct impingement system. Gas flow is controlled by a four position regulator. Several key parts, such as the short stroke gas piston, gas regulator, and bolt/carrier group are chrome plated. The bolt carrier features an integral lug in place of the AR-15's gas key. The flash hider is similar to Ruger's AC-556 and Mini-14GB.[2]
The rifle includes a number of other manufacturer's parts such as a Troy Industries railed handguard and folding iron sights, a Hogue rubberized pistol grip, and three Magpul PMAG 30-round magazines. The barrel is 16.25 inches (413 mm), chrome lined, and features a six groove, right hand, 1:9 inch twist.[1]
In August 2010, Ruger announced that the rifle would be offered in the 6.8mm Remington SPC cartridge.[3]
Criticism
Ruger's introduction of the SR-556 was met with some criticism for its high price tag (US$2,000) and its weight. Ruger addressed these shortcomings by introducing a lighter and less expensive rifle, the SR-556E.[4]
References
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