Continuing in the HK Sporting rifle line that was imported into the U.S. in the 1980s, but is no longer offered here is the HK770. The 770 is a semiautomatic rifle utilizing the famous HK delayed roller locking bolt. It has an overall length of 44.5 inches, and came with a polygonal bore profile barrel. It has two different magazines available, either three or 10 round capacity. The guns in the 630, 770 and 940 series all had integral flash hider/compensator slots at the end of the barrels.