FILE PHOTO: Polymer80 frame kits and upper receivers for Glock semi-automatic pistols are displayed for sale at Firearms Unknown, a gun store in Oceanside, California, U.S., April 12, 2021. REUTERS/Bing Guan
FILE PHOTO: Polymer80 frame kits and upper receivers for Glock semi-automatic pistols are displayed for sale at Firearms Unknown, a gun store in Oceanside, California, U.S., April 12, 2021. REUTERS/Bing Guan