ALEXANDRIA, Va., July 23 -- United States Patent no. 12,366,429, issued on July 22, was assigned to Magpul Industries Corp. (Austin, Texas).

"Back-up sights with compact aperture, centering sight post, and miniaturized windage detent mechanism" was invented by Zachary Freeman (Westminster, Colo.), Eric Nakayama (Broomfield, Colo.) and Timothy Eric Roberts (Broomfield, Colo.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A sighting system for a firearm and related methods are disclosed. The sighting system has front and rear flip-up sights, wherein the front sight comprises a flip-up portion having an aperture through which a sight post can partially extend; a knob comprising one or more notches on a first si...