Theoretical: The SOCOM M4A1 post-adoption of the FN AC

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Theoretical: The SOCOM M4A1 post-adoption of the FN AC

#12

04-09-2013, 06:12 PM

Spartan198 Spartan198 is offline

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I've only ever heard it referred to as direct impingement gas. If there's another name for it, I've no idea what it is.

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