The Leapers RBUS4BM UTG PRO AR15 Ops Ready S4 Mil-spec collapsible stock kit in FDE with buffer tube assembly for AR-15 rifles includes a ergonomic slanted cheek rest and rubberized butt pad. AR-15 stock is beyond sub compact size is Ideal for AR15 SBR rifles. Comes Complete with Mil-spec Extension Tube, Buffer, Buffer Spring, Receiver End Plate, and Castle Nut. Stock Is Molded from Impact Resistant High Strength Matte Black Polymer. Unique 4.28" Length with 4 Position Adjustability Provides Comfortable Length of Pull and Ease of Shouldering Firearm when Wearing a Load Bearing Vest or Plate Carrier System. The Low Profile and Lightweight Design Does Not Add Excessive Bulk To Your rifle. Height is 4.75 inches. Length is 4.28 inches. Color black. Made in USA. Limited Lifetime warranty.