The Squad Designated Marksmanship Rifle is tested on a range at Robins Air Force Base, Ga., April 13, 2022. The SDMR is a semi-automatic, 7.62x51mm caliber rifle designed by Heckler & Koch for missions requiring combat over-watch with precision-fire capability to accurately engage targets up to 600 meters. (U.S. Air Force photo by Shaun Ferguson)