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One of the most tested and proven weapons systems in the world achieves ultimate refinement in the SIG516 rifle. With its Nitride treated, military grade barrel and adjustable, four-position gas regulator, the piston-driven SIG516 incorporates all of the most desirable mechanical improvements. Add to these a free-floating forend, and you have the most advanced, versatile AR-based rifle available.
Caliber: 5.56 NATO
Barrel Length: 16 in
Operating System: Gas Piston
Twist Rate: 1:7