ALEXANDRIA, Va., June 25 -- United States Patent no. 12,339,084, issued on June 24.
"Firearm platform and method of connecting upper and lower receivers" was invented by Keith Berry (Georgetown, Texas).
According to the abstract* released by the U.S. Patent & Trademark Office: "A firearm platform and method of connecting an upper receiver to a lower receiver. The upper receiver has a pivot lug and a takedown lug with perimeter openings in opposite directions. The lower receiver has a locking member that pushes against the takedown lug which causes the upper receiver to displace forward. As a result of the forward displacement, a pivot pin in the lower receiver exerts an opposing force against the pivot lug. The locking member is displaced...