AR15 Why Are They So LOUD?

All rifles are loud, but the likely reason the AR-15 sounds so much louder is this little device right here.

It’s a flash suppressor. Its main reason for existing is to eliminate as much of the fireball that comes out of the rifle barrel as possible. It does this well, but it also happens to direct a little bit of the gas sideways into the range. Along with those gases comes a bit of sound.

However, the guy that REALLY makes everyone angry is the guy that mounts one of these on their 300 Win Mag.

This is a muzzle brake and it’s designed specifically to redirect most of the gases to the rear to help pull the rifle forward and reduce the recoil of the rifle.

Muzzle brakes work well at reducing recoil and some rifles, like the 50-caliber Barrett, would be almost completely unmanageable without one. The main reason people hate them is they are loud. They redirect so much gas to the side and rear that they can literally break stuff.