Product Description
6-position Mil-spec Diameter Receiver Extension Tube for AR15 Rifles; Machined from 6061-T6 Aircraft Grade Aluminum; Precisely Rolled Threads for Durable Thread Engagement with Lower Receiver; Underwent the Tightest Tolerance Controls for a Secure Fit and Function with Various Collapsible Stocks; Finished in a Matte Black Type III Class II Hard Coat Anodize; Proudly Designed and Made in USA