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How the AR 15 / M4 DI or Direct Impingement System Works

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Published on Oct 7, 2013

Fun Gun reviews Presents: "How the AR 15 / M4 DI Direct Impingement System Works". Demonstrating the way the Bolt, Gas system, and Recoil functions in the AR-15 /M4 carbine.

Thanks for watching~ Sootch00

Music: "Military Operation" Pond 5

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