MUZZLE

The end of a gun barrel from which the bullet or shot emerges.

MUZZLE BLAST

The resultant noise that occurs at the muzzle of a firearm when the projectile leaves the muzzle and hot gases are released.

MUZZLE BRAKE

A muzzle attachment or feature that uses the propellant combustion gas with the desired effect of redirecting the recoil.

MIRAGE

A visual phenomenon that appears to displace a target from its true position through a shimmering effect. It is caused by heated air that deflects light rays.

MUZZLE CAP

A cover put on the muzzle end of a barrel to keep out foreign matter.

MISFEED

Any malfunction during the feed cycle of a repeating firearm resulting in the failure of a cartridge or shell to enter the chamber completely. Also known as Failure to Feed.

MUZZLE ENERGY

A projectile’s energy at the time it leaves the muzzle of a gun.

MISFIRE

A failure of the priming mixture to be initiated after the primer has been struck an adequate blow by a firing-pin or the failure of the initiated primer to ignite the powder.

MUZZLE FLASH

The illumination which is the result of the expanding gases from the burning propellant particles emerging from the barrel behind the projectile and uniting with oxygen in the air.

MONOBLOC

The solid section at the breech end of some multi-barrel guns into which the barrels are inserted.