SIG 556 SBR w/AAC M4-2000 Suppressor
This is a comparison with firing a SIG 556 SBR (Short Barrel Rifle) with a flash hider and then with an AAC M4-2000 MOD 08 suppressor. The piston operating system isn't very efficient for sound suppression and a short barrel doesn't help any either. The M4-2000 does a good job but unfortunately this set up isn't competely hearing safe...almost but not quite.