The two crossword solutions for the term GUN COMPONENT are HAMMER (6 letters) and TRIGGER (7 letters). A HAMMER is a metal part of a gun that strikes the firing pin to ignite the cartridge. It is usually made of steel and is located in the receiver of the gun. A TRIGGER is a lever or button that, when pressed, releases the HAMMER to fire the gun. It is typically made of plastic or metal and is located on the outside of the gun.