POF P19 Gen 4 Pistol, 9mm, 4.02" Barrel, Black Polymer Grip, Nitride Finish, Fiber Optic/Blackout Sights, 15 Rounds. The slide is machined from 17-4 stainless steel with a Nitride heat treated Finish for maximum environmental protection. It also features an optics plate that will fit the Trijicon RMR footprint, and ships with a fiber optic front sight and blacked out rear sight. The frame features a flared magwell, contoured grip, interchangeable backstraps, enhanced mag release, slide stop guard, extended beaver tail, enlarged trigger guard, forward thumb ledges, and more.