Abstract: A locking mechanism for locking an orientation of a weapon is disclosed. The locking mechanism includes a first movable arm adapted to contact and apply pressure onto a control surface associated with the weapon, and a second movable arm adapted to contact and apply pressure onto the control surface associated with the weapon. The locking mechanism further includes a valve for applying and removing resistance to the first movable arm and the second movable arm, to thereby control a resistance to movement of the first movable arm and the second movable arm. The valve is adapted to remove resistance from the first movable arm and the second moveable arm in order to allow the weapon to be moved freely into a desired orientation. After the weapon is moved into the desired orientation, the valve may be moved again to increase resistance to thereby allow for fine adjustments in the orientation of the weapon. Finally, the valve may be completely closed to lock the orientation of the weapon.

Abstract: A hangfire protection system for an externally powered gun includes a recoil sensing mechanism cooperating with a sear latching mechanism such that in the event of a hangfire, a sear engages a safety link on the chain drive assembly to keep the bolt locked. If the round fires, gun function continues; if the round does not fire there is a delay of a sufficient time to assure that the round is a dud, and it is ejected. The details of the mechanical hangfire protection system are described.