US12687355 - Firearm with integrated lower receiver components
Firearms with integrated lower receiver components have a bolt hold open element movably connected to a frame to the rear of a magazine well and configured to move between a protruding position operable to restrain a bolt assembly rearward of the magazine well, and a retracted position operable to enable the bolt assembly to move forward beyond a rear portion of the magazine well, an elongated link connected to the bolt hold open element, a forward portion of the elongated link extending forward of the magazine well and having an actuator portion extending above the magazine well and configured to be actuated by a magazine follower, the elongated link having a first elongated portion received by the frame to rotate, the elongated link having an arm extending laterally from the first elongated portion and having a free end movable between an elevated and lowered position and including the actuator portion.