ALEXANDRIA, Va., July 21 -- United States Patent no. 12,687,355, issued on July 21, was assigned to XCAL IP LLC (Ashburn, Va.).

"Firearm with integrated lower receiver components" was invented by Jason Kiyoshi Brown (Chantilly, Va.).

According to the abstract* released by the U.S. Patent & Trademark Office: "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 elem...