Letter: T

The tapered portion of the bore of a barrel, immediately ahead of the chamber which is sized to provide clearance for the bullet of the loaded cartridge. Also referred to as Leade or Ball Seat and is associated with Free Bore. See Free Bore.

A projection which extends behind the breech end of the barrels on some breakopen firearms. When the gun is closed, it fits into a corresponding recess slot in the frame and is used for locking purposes.

An unmounted, portable handloading tool using a plier action for handloading centerfire cartridges. Also called Nutcracker Tool.

The bottom (lower) end of a buttplate and adjacent portion of the stock on a shoulder firearm.

The total elapsed time that a projectile requires to travel a specific distance from the muzzle.

Any stock having a contoured hole in the grip area to accommodate the thumb of the trigger hand.

A type of manual safety in which the external control component is located for convenient operation by the thumb of the trigger hand.

A ledge in the grip area of a rifle or handgun on which to rest the thumb of the trigger hand.

To disassemble a firearm for cleaning, repair or transportation.

A type of firearm designed for ease of disassembly and transportation.