short stroke gas piston and bolt carrier group
<a href="https://en.wikipedia.org/wiki/User:Zeos386sx" class="extiw" title="en:User:Zeos386sx">Zeos386sx</a> (<a href="https://en.wikipedia.org/wiki/User_talk:Zeos386sx" class="extiw" title="en:User talk:Zeos386sx">talk</a>) 01:18, 13 February 2011 (UTC)
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