With demand very high for pistols to send to our troops, Colt shut down the Commercial side of production and sent over 6000 pistols over to the Military side of production. Some of the pistols already had The Government Model markings and serial number roll marked on them. These pistols had the markings crudely peened and remarked with Military marks and serial numbers. The nice blue finish was sand blasted off and the pistol was parkerized. This is what is known as C/M.