6-position Mil-spec Extension Tube for .308, Black

6-position Mil-spec Diameter Receiver Extension Tube for AR308 Rifles
Extension Tube CNC Machined from 6061-T6 Aircraft Grade Aluminum with 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
Material: Aluminum
Height: 1.46
Length : 7.9
Weight: 4.0oz
Color: Black