Built for Heavy-duty Use with the Tightest Tolerance Controls; Stock Molded from Impact Resistant High Strength Polymer; Minimal Bulk Profile, Lightweight, Beyond Sub Compact Size, Ideal for SBRs; Unique 4.28" Length with 4 Position Adjustability; Combine with Super Slim Handguards for a Superior Firearm Handling Experience; Includes Ergonomic Slanted Cheek Rest and Rubberized Butt Pad; Features a Reversible Sling Swivel Housing for Left or Right Handed Shooters; Standard Sling Loop for Traditional Slings; Removable 5.51" Extended Cheek Rest Insert Included; Complete with Mil-spec Extension Tube, Buffer, Buffer Spring, Receiver End Plate, and Castle Nut; Made in USA