Fusion Diamond Series, Defender, Monolithic, 1911 Colt Style Slide. Comes completely machined. Our Diamond Series Slides are precision CNC machined from 4140 Bar-Stock and heat treated. 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 machined to take the 9mm / 38 super firing pin, as with all high grade slides. This slide is also machined for a bull barrel and reverse plug system. This slide has the 45 acp breech face cut so will work with all of the 45 cartridge group, 45 acp, 45 Super, 400 Corbon..etc.