Patent attributes
Firearms with ambidextrous bolt hold-open have a receiver defining a magazine well configured to receive an ammunition magazine having a follower that is spring biased toward an open end, the receiver defining a passage receiving a bolt assembly operable to reciprocate between a forward battery position and a rear retracted position, the bolt assembly being operable to strip a cartridge from the magazine upon movement from the rear retracted position to the forward battery position, a bolt latch movable between a latched position in which the bolt latch prevents movement of the bolt assembly from the retracted position to the battery position, and an unlatched position in which the bolt latch permits movement of the bolt assembly from the retracted position to the battery position, the bolt latch being responsive to the magazine having an elevated follower without ammunition to move to the latched position.
