Hmmmm! Nuzzle Brakes, Suppressors, Silencers! Three very different things! Muzzle Brakes are to counteract recoil Muzzle Lift, and are Very Loud, especially to either side of barrel! Suppressors (Mufflers) reduce firing report (Noise) by about a third, plus help reduce felt recoil! Silencers (Super Mufflers) are meant to be used with sub-sonic ammo (under 940 fps at muzzle), so as to greatly reduce muzzle blast (by at least 2/3), eliminating Sonic Boom, and is so quiet used as designed that no ear plugs or ear cups are usually needed. Personally, I use plugs and cups at most ranges! Recently I've noticed that many ranges no longer allow use of muzzle brakes on firing line, concerned about hearing damage! In Europe suppressors are used almost everywhere, but not mandatory. I'm glad to see more concern for hearing safety! In Europe several suppressors are commonly used that look a lot like lawn mower mufflers, and sell for less that $100 US. Probably we will soon follow suite here in the US! Be safe, and take care of your hearing!!!