Originally Posted by
gadgetman
No. It is simple physics. It will be acting as an effective brake, not as well as a muzzle brake, but with a typical 1/3 reduction (most rounds seem to have a powder load around half of the projectile weight and the gases are going faster than the projectile). On top of that the suppressor adds mass which reduces recoil too. Being essentially a closed system until the projectile exits the system, the internal 'muzzle brake' of a suppressor has no effect on external recoil as Greg stated, but by holding back the gases and allowing them to cool and releasing them at a slower velocity, etc it does have a major effect.