The Ruger SR-556 Semiautomatic Rifle has a chrome-plated, two-stage, piston-driven operating system, capable of offering better dependability in comparison with gas-driven rifles. It comes with a four-position, chrome-plated gas regulator that is capable of allowing the hunter to tune the rifle to specific conditions or ammunition. Also chrome-plated are the extractor, the bolt carrier and extractor. The Troy Industries quad-rail handguard provides a rigid mount for the piston-driven transfer rod. Included as standard are three 30-round MAGPUL PMAG magazines as well as a soft-sided carry case.
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