HAND

The lever that rotates a revolver cylinder. Sometimes called a Pawl or Dog.

HAND CHECKERING

A process of wood carving gun stocks by hand rather than machine.

HAND STOP

An attachment beneath the fore-end or forearm of a target rifle to restrict the forward movement of the hand. Often also used to attached a target sling.

FUSED SHOT

Two or more shot pellets joined together during the process of manufacturing or during firing.

GAIN TWIST

Barrel rifling in which the rate of twist is faster at the muzzle than at the chamber end.

GAS CHECK

1. A metallic cup attached to the base of some lead alloy bullets. 2. An obturating cup used under the piston in crusher pressure testing.

GAS CHECK BULLET

A lead alloy bullet with a cup pressed over the heel. Usually copper or gilding metal.

GAS CUTTING

An erosive effect in a firearm caused by the high velocity, high temperature propellant gases.

GAS OPERATED ACTION

An automatic or semiautomatic type firearm in which the propellant gases are used to unlock the breech bolt and then to complete the cycle of extraction and ejection. This is accomplished usually in conjunction with a spring which returns the operating parts to battery.

GAS PISTON

The component in a gas-operated firearm upon which the propellant combustion gas impinge to operate the action.