UTG Pro RBUS1Bm Mil-Spec S1 AR15/M16 Rifle Buttstock Kit Aluminum/Polymer Black Leapers Mil-Spec Stock Is Molded From Impact Resistant High-Strength Polymer With a Black Finish And The Extension Tube Is constructed From Aircraft crade Aluminum With Rolled Threads, With An anodized Finish. The Dual Storage Compartment With Removable Caps provides Dry Storage For Batteries. This Kit Includes Polymer Stock, Mil-Spec 6 Position Extension Tube, Buffer And Buffer Spring, Tear-Drop Ring And Castle Nut, And Is Made In The US.
