Abstract: A break open firearm having a top lever adjusting system that allows the radial position of the centerline of the top lever to be easily positioned just to the right of the centerline of the frame top tang when the action is closed.

Abstract: A break open firearm having an automatic safety system that can be easily converted to a manual safety, combined with a safety barrel selector mechanism that can also be locked in the fire position to always fire a preselected barrel first.

Abstract: In a break open firearm, an automatic ejection system that utilizes the hammer cocking rods to cam the ejector sears into position to latch the ejectors.

Abstract: A firing pin block for a firearm of the type having a reciprocating bolt assembly including a breech bolt and slide block, a firing pin, and a pivotal locking block. The slide block and locking block have cam means which cooperate to pivot the locking block in and out of locking engagement with a recess in the barrel as the slide block is reciprocated to close and open the bolt. The operation of these cam means is coordinated with relative longitudinal displacements between the bolt and slide block so that, at any time the locking block is not completely locked, the slide block prevents sufficient forward movement of an abutment on the firing pin to cause the firearm to discharge. This firing pin block is effective even though the firing pin spring and retaining pin may be broken, distorted, or missing.

Abstract: An ejection port cover for a firearm which moves in pure rotation about an axis parallel to the bore of the firearm. The port cover is held about this axis and is oriented in the "open port" and "closed port" rotational position for proper alignment of a port cover cam with associated cam pin means on the reciprocating slide assembly since the port cover is shorter than the stroke of the slide assembly that engages and causes rotation of the port cover.

Abstract: A shell cut-off latch for use in a break-open firearm having a magazine tube mounted parallel to the firearm barrel. The cut-off latch functions to retain cartridge(s) in the magazine tube when the firearm is in the break-open position and is cammed out of latching position when the firearm is in closed position and the action assembly and bolt means are in the forward, ready-to-fire position.

Abstract: A bolt latch for use in a firearm having a rotary locking system in which the latch locks the rotational movement of the bolt at all times during the cycle of operations of the gun except during locking and unlocking of the bolt head with the barrel extension.The bolt latch is pivotally mounted to the bolt carrier for movement perpendicular to the axial movement of the bolt and is spring biased outwardly into bolt blocking position wherein the bolt cannot move relative to the bolt carrier and thus rotation of the bolt is prevented. The bolt latch is actuated into non-blocking position (i.e. rotation of the bolt is permitted) as the bolt approaches the breech-closed position by a cam means on the firearm.