M4, HK-416, SR-556, and now SIG-516?

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M4, HK-416, SR-556, and now SIG-516?

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#11

09-15-2010, 08:38 AM

Ermac

Junior Member

Join Date: Apr 2010

Posts: 17

Are pistons a gimmick? I don't know. I don't own a Piston AR. To be fair, the army is looking to upgrade the M4's reliability and a piston is a likely choice.

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