The Smith & Wesson 642 Airweight Centennial Revolver in .38 Special features a 1.875-inch barrel, stainless steel finish, synthetic grip, front integral sight, rear fixed sight, Buy SMITH & WESSON 642 AIRWEIGHT .38 SPECIAL DA 1.875″ REVOLVER hammer, round butt, smooth target trigger, an overall length of 6.31 inches, an unloaded weight of 15 oz, and a 5 round capacity.