The M21 Sniper Weapon System is a semi-automatic sniper rifle used by the U.S. military. It is based on the M14 and fires 7.62x51mm NATO ammunition from a 20-round box magazine. It's basically a match-grade M14 with a scope.
The following tags are aliased to this tag: m-21 (learn more).
This tag implicates sniper_rifle (learn more).
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