ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,460,907, issued on Nov. 4.
"Light weight ammunition and firearm systems" was invented by James Matthew Underwood (Kennesaw, Ga.) and Larry Cullen Underwood (Canton, Ga.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A firearm system includes a bolt carrier with an internal cavity, a piston disposed within the internal cavity, a forward configuration where the piston is in a forwardmost position relative to the bolt carrier, and an aft configuration where the piston is in a rearmost position relative to the bolt carrier. The piston slides forward and aft relative to the bolt carrier. In the forward configuration, the entire piston remains disposed within ...