ALEXANDRIA, Va., Jan. 20 -- United States Patent no. 12,529,533, issued on Jan. 20.
"System for delayed blow-back action firearm" was invented by Bryan Zeman (Lake Havasu City, Ariz.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a blow-back bolt and recoil spring/buffer system for an autoloading firearm action. The blow-back bolt includes a bolt body and an actuator that is longitudinally movable relative to the bolt body to a limited extent by manual cycling. The recoil spring/buffer system has a longitudinal guide rod with at least one recess, a release component and a forward abutment slidably arranged together on the guide rod, a recoil spring is configured to bias the release component forw...