If you've started shopping for a suppressor for your AR-platform rifle or pistol, you've probably run into a debate that trips up even experienced shooters: how does your host's operating system — direct gas impingement or straight blowback — actually affect suppressor performance? The answer isn't just about sound signature. It touches reliability, felt recoil, cleanliness, and even how much back pressure gets shoved into your face on every shot. This guide breaks down how each syst …