Zaffiri single billet 17-4 stainless steel slides are manufactured with tight tolerances that allow an increase in accuracy and performance. Specifications for Zaffiri OPMOD Z51M Glock 19 Pistol Slide w/RMR Cut: Manufacturer: OPMOD Gun Make: Glock Gun Model: Glock 19 Cartridge: 9mm Luger Gun Frame Size: Compact Optic Cut: RMR Cut Length: 8 in Width: 1 in Height: 2 in Features of Zaffiri OPMOD Z51M Glock 19 Pistol Slide w/RMR Cut: ZP Zaffiri OPMOD Slide Glock 19 Gen 3 Custom Cerakote with matching cover plate Heat treated for reliable strength and long-term durability Package Contents: Zaffiri OPMOD Z51M Glock 19 Pistol Slide w/RMR Cut