ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,510,321, issued on Dec. 30, was assigned to AXTS INC. (Redmond, Ore.).

"Gas port geometry" was invented by Joshua A. Underwood (Redmond, Ore.), Anibal Salinas (Redmond, Ore.) and Seth K. Peterson (Redmond, Ore.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A firearm or firearm retrofit assembly may include a compensation assembly to receive gas expelled from a muzzle of a barrel or an egress in a length of the barrel. The compensation assembly may include one or more gas flow-directing sections to tune the flow of gas through the compensation assembly, which may reduce recoil. Other embodiments may be disclosed and/or claimed."

The patent was filed on...