In “The Gun the Army Can’t Kill” (August/September 1983,) Mr. Andrews is thoroughly in error by opening the .38 versus .45 debate by stating that “ever since the 184Os the standard Army sidearm had been the .45-caliber single-action pistol.” This is not so. In the 184Os the standard Army sidearm was a muzzle-loading cap-and-ball, single-shot pistol of caliber .54. This big-caliber, black-powder percussion pistol was the standard sidearm of the U.S. Army from 1842 until the Civil War, when the Union ordnance certified no fewer than ten makes of sidearms, all of them blackpowder, cap-and-ball revolvers of .36 or .44 caliber. A .45-caliber single-action pistol did not become a standard Army sidearm until 1873, when the U.S. ordnance placed a trial order of eight thousand Colts for cavalry use. These handsome revolvers were continuously produced by Colt until 1941 and were later reinstated after popular outcry. This particular weapon was the gunfighter’s gun, of which we have seen so much in the movies.