firing spring

The sear releases the guide, which moves forward under the pressure of the firing spring.

"The next time I come down this way, I'm going to bring you some cartridges and a firing spring for that thing."

The fully compressed firing spring pushes the guide and firing pin forward.

This pushes the firing pin holder sleeve forward, compressing the firing spring.

(d) When the pressure on the trigger fork is released, the firing spring continues to expand forward and rearward with equal force.

The compressed retracting spring pushes back on the firing pin and is restrained only at its forward end by the firing spring stop and breechblock.

The PIAT launcher was a tube constructed out of thin sheets of steel, and contained the trigger mechanism and firing spring.

(c) This releases the firing pin holder, allowing the compressed firing spring to expand and snap the firing pin forward (view C, sheet 2).

The lower end of the lever pushes against a lug in the guide, moving the guide rearward and compressing the firing spring until the sear lug passes the sear.

The forward motion of the firing pin reduces the distance between the shoulder on the firing pin and the firing spring stop, thereby compressing the retracting spring between them.

The firing spring stop strikes the forward end of the breechblock, inertia carrying the guide forward until it strikes the breechblock; at the same time, the firing pin hits the primer and fires the weapon.