Tactical Tuesday Livestream | USCCA
This guide explains why piston-driven AR-15s are superior to direct impingement (DI) systems when used with suppressors, especially in short-barreled configurations. Suppressors increase gas pressure, which can cause reliability issues and fouling in DI systems. Piston systems are designed to handle this increased gas more effectively, leading to cleaner operation and consistent performance. The video references military adoption of piston systems like the HK 416 for suppressed use and suggests brands like Adams Arms as viable alternatives.













