Most variants of the Garand, save the sniper variants, never saw active duty. The sniper versions were modified to accept scope mounts, and two versions (the M1C, formerly M1E7, and the M1D, formerly M1E8) were produced, although not in significant quantities during World War II. The only difference between the two versions is the mounting system for the telescopic sight. In June 1944, the M1C was adopted as a standard sniper rifle by the U.S. Army to supplement the venerable M1903A4, but few saw combat; wartime production was only 7,971 M1Cs.