1911 Slide, Fusion Diamond Series Commander Slide. Combat GI Colt Style. Comes completely machined for 45acp caliber barrels. This slide is precision CNC machined from 4140 Bar-Stock and heat treated. Featuring GI/Mil spec rear serrations and standard dovetail Rear: .495 x 65 degree, Front: .330 x 65 degree sight cuts. These slides are supplied "in the white", matte finish and oil dipped. The firing pin holes on all diamond series slides and top ends are reamed to take the 9mm / 38 super firing pin, as with all high grade slides. This slide has the 45 ACP breech face cut so it will work with all of the 45 cartridge group (45 ACP, 45 Super, 400 Corbon, 460 , etc.) Mfg: Fusion Firearms