Trigger (firearms)

A trigger is a mechanism that actuates the firing sequence of a firearm or crossbow; a trigger may also start another mechanism such as a trap or a quick release. A small amount of energy applied to the trigger causes the release of much more energy. Triggers usually consist of levers or buttons actuated by the index finger. Some variations use the thumb or weak fingers to actuate the trigger, a feature found on mounted weapons such as the M2 Browning machine gun and the Springfield Armory M6 Scout.

Function

Firearms use triggers to initiate the firing of a cartridge in the firing chamber of the weapon. This is accomplished by actuating a striking device through a combination of spring and kinetic energy operating through a firing pin to strike and ignite the primer. There are two primary types of striking mechanisms, hammers and strikers. Hammers are spring-tensioned masses of metal that pivot on a pin when released and strike a firing pin to discharge a cartridge. Strikers are, essentially, spring-loaded firing pins that travel on an axis in-line with the cartridge eliminating the need for a separate hammer. The connection between the trigger and the hammer is generally referred to as the sear surface. Variable mechanisms will have this surface directly on the trigger and hammer or have separate sears or other connecting parts.

Single Action (album)

Single Action is an album by saxophonist Willis Jackson with guitarist Pat Martino which was recorded in 1978 and first released on the Muse label.

Reception

In his review on Allmusic, Scott Yanow notes that "Single Action does give one a good example of Jackson playing in a tenor style that (other than Houston Person and now Joshua Redman) is quickly disappearing."

Track listing

All compositions by Willis Jackson except as indicated

Personnel

References