Whats the difference between DI and Gas Piston AR's? - #FriendlyFire
This video explains the fundamental difference between Direct Gas Impingement (DI) and Gas Piston AR-15 operating systems. It clarifies that all AR-15s utilize gas, with the key distinction being where that gas interacts with the action. DI systems channel gas directly into the upper receiver to the bolt carrier, while piston systems use an external rod to push the bolt carrier.












