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AR-15 Gas System

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3D animation explaining how the AR-15 gas system works.

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30 COMMENTS

  1. This is why many argue the AR-15 is not a true direct impingement system. On most DI rifles the gas port dead ends on a cup on the bolt or carrier, such as on the French MAS-49.

  2. Wait i always thaught that 1 or 2% of gases were transferred to the gas port before the rest of the gases went in the gas tube trying to expand after the bullet left which explains the 0% velocity loss between a gas operated gun and let's say a bolt action or recoil gun
    Can someone please explain?

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