Complete slide assembly. Stainless steel construction. Designed with tighter tolerances to increase accuracy and performance. These are the best aftermarket slide available today. Easy to install. Machined billet 1704 Stainles steel. Absolute co-witness sights, RMR cover plate, Includes all internals except barrel and recoil guide. Available finish: DLC (diamond like carbon/black), F D E (Flat dark earth), & Gray. Made in U.S.A.