Loaded The Pistol Is Ready To Fire

Right. Rear view showing arrangement of cartridges in straightline magazine. Left. Right side view at end of recoil stroke showing ejection port in slide.

The trigger is equipped with a heavy boss having a thick pin milled out of the receiver on the left side below the breech. There is a nose above and to the rear of this boss which engages with the interceptor block placed above it. This interceptor block is pivoted to the tail of the sear.

Interceptor Action

A small coil spring below the interceptor acts to thrust the upper face of the interceptor through a groove in the receiver extending up into a corresponding groove in the underside of the slide. When the slide recoils, its solid surface hits this interceptor face and drives it down inside the receiver. In this position, the interceptor is drawn out of contact with the trigger nose. Hence, while the sear can catch and hold the striker in rearward position, the trigger cannot come into contact with the sear lever to release the firing mechanism until the slide is fully forward and closed and the trigger is released to permit its spring to push it forward so that the interceptor (or inter-ruptor) block can rise under influence of its spring into the cut on the underside of the slide. The sear is a long lever operating on a pivot. Its rear upper end is designed to catch in a slot in the underside of the striker as the striker is forced back during rearward motion of the breechblock-slide.

Operation

When the trigger is pressed, it rotates on its pin and a small catch at its upper rear is elevated to hook under the edge of the sear lever. This depresses the rear of the pivoted lever, meanwhile compressing the sear spring below, and draws the sear out of contact with the striker.

The compressed striker spring within the striker tube thrusts the striker forward to hit the cartridge in the chamber and discharge it. As the bullet travels down the barrel, the slide starts to move much more slowly to the rear. The extractor in the face of the breechblock end of the slide carries the empty cartridge case back with it. The forward arms of the slide below the barrel carry the recoil spring back and compress it around its guide below the barrel. As the slide opens, exposing the breech opening for ejection, a solid surface on the slide on its under travel side on the left runs over the head of the interceptor (or interruptor) block and pushes it down. This forces the trigger catch below it down to a point where it cannot engage with the sear lever. The scar spring thrusting the rear end of the sear lever up, enables it to engage in the underside of the striker cut as the striker reaches full compressed position.

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