US12687355 - Firearm with integrated lower receiver components
The patent describes a firearm design featuring an integrated lower receiver with a bolt hold open mechanism that can be actuated by a magazine follower, allowing for controlled movement of the bolt assembly. This design includes an elongated link connected to the bolt hold open element, which facilitates the transition between restraining and releasing the bolt assembly relative to the magazine well.
Claim 1
1 . A firearm comprising: a frame having a barrel extending in a forward direction and defining a bolt passage configured to receive a reciprocating bolt assembly; the frame defining a magazine well; a bolt hold open element movably connected to the frame to the rear of the magazine well and configured to move between a protruding position operable to restrain the reciprocating bolt assembly rearward of the magazine well, and a retracted position operable to enable the reciprocating 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 defining a link axis and received by the frame to rotate about the link axis; 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; the free end of the arm including the actuator portion; wherein the frame includes a feed ramp element at a forward portion of the magazine well; and wherein the feed ramp element defines an aperture receiving the actuator portion of the elongated link. a frame having a barrel extending in a forward direction and defining a bolt passage configured to receive a reciprocating bolt assembly; the frame defining a magazine well; a bolt hold open element movably connected to the frame to the rear of the magazine well and configured to move between a protruding position operable to restrain the reciprocating bolt assembly rearward of the magazine well, and a retracted position operable to enable the reciprocating 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 defining a link axis and received by the frame to rotate about the link axis; 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; the free end of the arm including the actuator portion; wherein the frame includes a feed ramp element at a forward portion of the magazine well; and wherein the feed ramp element defines an aperture receiving the actuator portion of the elongated link.
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USPTO PDF
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