So talking now further from my Canadian perspective, we cannot use any sound altering device call it whatever, we like it or not, that is fine.
But a muzzle break strips off the air blast in front of the projectile path how it exits through a barrel - I can imagine that...
also
strips off the the air turbulence behind a projectile as well ones left the muzzle, - and I can imagine that one as well.
So I cannot see any negative effects with a good muzzlebreaker vs a suppressor in example, which actually traps the airblast internally. Did anybody confirmed helped the accuracy? I have not seen anything else then just a placebo effect.
As of the muzzlebreak creates a laud sound as a F...well...I was waiting for more then a year for this my shooting range start working again and I will sit in between some large bore snipers with a highest $$ ear protection on my head...uhm what to say.
The other opinion I have about suppressors, yes I like it maybe in the basement late hours I don't want to wake the "boss", but
if you have a suppressor because of your neighbours = that means your neighbours are way too close = and if your neighbours are way too close... you shall not discharge your weapon...or I may be wrong?