The Kratos Design Group 8-Position Receiver Extension is fully compatible with VLTOR's patented A5 system. This receiver extension is slightly longer than the traditional M4 receiver extension to utilize rifle length springs and A5 buffers and is designed to work with Mil-Spec dimensioned M4/AR-15 type collapsible stocks. For AR15/M16 applications, it must use Vltor A5 or A5 compatible buffers & rifle length recoil springs We recommend the Sprinco Green Spring for most applications.
This receiver extension tube can also can be utilized as a replacement receiver extension for the AR-10 rifle.
Dialing in the perfect length of pull is easy with eight adjustable stock positions.
The Kratos Design Group buffer tube is made of impact-extruded 7075 Aluminum and is made to withstand rigorous use. The finish is a Type III Class 2 hardcoat anodize.
Weight: 4.3oz Material: Impact-Extruded 7075 aluminum Finish: Type III, Class 2 hardcoat Anodize UN-2A threads Made in USA