Letter: M

The generally upward motion of the muzzle of a firearm which occurs upon firing.

The velocity of a projectile as it exits the muzzle of a firearm.

The air that is compressed and moves out radially from the muzzle of a firearm after firing a projectile.

An electrical or optical device which signals the passage of shot or a projectile at the muzzle of a firearm.

Firearm which can only be loaded with powder and projectile(s) through the muzzle or front end of a cylinder in the case of a muzzleloading revolver.

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

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

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.

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

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.