ALEXANDRIA, Va., June 4 -- United States Patent no. 12,320,608, issued on June 3, was assigned to Sturm Ruger & Co. Inc..
"Bolt assembly for firearm" was invented by Frank J. Saunders Jr. (Dunbarton, N.H.), Reed Matthew Hubbell (Prescott, Ariz.) and Benjamin Gerard Hawkins (Sunapee, N.H.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A modular two-piece bolt system for firearms with blowback actions provides a rear bolt piece which detachably couples to plural different front bolt pieces each of different mass. The front bolt pieces have a similar configuration and common coupling interface which forms an interlocked relationship with a complementary configured coupling interface on the rear bolt piece to pr...