General Description And Mode Of Operation-Full Automatic
Before getting into the description of operation 1n the full-automatic mode, please refer to drawing # 2A which shows an overlay of disconnector assembly required for this conversion. This will help the reader better understand the sequence of operation.
When the trigger is depressed, the trigger sear and harnner disengage, allowing the hammer to strike the firing pin and detonate the cartridge. The slide unlocks the bolt and recoils backwards, extracting the spent cartridge. The firer still has the trigger depressed. The hammer is caught and held back by the secondary sear as the bolt completes Its rearward travel. (See drawing # 2C) Recoil spring pressure reverses the bolt travel which will then strip a live cartridge from the magazine and begin to chamber it. As the cartridge is fully chambered and as the bolt starts to rotate to lock, the slide is still not fully closed. It is at this time that it contacts a tripping lever and forces it forward. This forward movement of the tripping lever produces a rearvard movement of the disconnector which is attached to the secondary sear. This movement forces the secondary sear rearward, releasing the hammer to strike the firing pin again. During the time necessary for the secon dary sear to disengage and for the hammer to strike the firing pin, the slide will have reached its furthermost forward travel and the bolt will be fully locked, ensuring safety to the firer. (See drawing if 2D) This firing sequence will repeat as long as the trigger is depressed and as long as cartridges are in the magazine. When the trigger is released, the trigger sear will engage and hold the hammer back in the cocked position. Applied pressure by the firer to the trigger will resume automatic firing.
Was this article helpful?