Smyth Busters: Does an AR-15 Piston Need Cleaning?
This video debunks the myth that AR-15 gas piston systems do not require cleaning. Brownells Gun Techs Steve Ostrem and Caleb Savant explain that while piston systems keep fouling in the gas block rather than the action, carbon still accumulates and can cause the system to seize if not cleaned. They draw parallels to other firearms like the Garand, M1A, FN FAL, and AK, which are known to require regular cleaning. The experts emphasize that no self-cleaning gun currently exists and that powder residue will always be present, requiring maintenance regardless of the operating system.








