What do the Muzzles on the barrel of the gun do?

Reduce recoil. Very effectively too

Also they give different muzzle flashes......not that it really effects anything and I really don't notice a difference. Of course when someone is shooting at you I don't think you'd take the time to observe how their flash looks.

When we say they reduce recoil, we mean that they make your sustained fire more accurate than it otherwise would be. It doesn't make the first shot any more accurate, but if you hold down the trigger your later shots will be a lot more accurate with a muzzle brake.

Reduce recoil but also reduce the accuracy and decrease the equip speed. Use a grip if you can while using muzzle breaks to cancel out the negative accuracy. :spotted owl:

actually i think it's the range they decrease, not the accuracy