Grey's ggp17 stripped slide is machined from 17-4 billet stainless steel with a black nitride coating inside/out and has dual optic cutout for trijicon rmr or leupold deltapoint pro.It comes with a custom g10 cover plate and proper screws for cover plate, and correct length screws for rmr and dpp.This version 4 features front and rear "micro-studded scale" texture.Finish: Black NitrideModel: GGP17Material: 17-4 Stainless Steel