Letter: M

A full length rifle stock which extends from the butt to the muzzle.

A safety device on some firearms that must be manually engaged and subsequently disengaged to permit normal firing.

A term used in conjunction with a number to designate a specific model or type of firearm or ammunition.

Words or symbols, stamped, rolled, cast or engraved, on a firearm designating the manufacturer, model, origin, caliber or gauge, choke, material, etc.