Vltor AR-15 Receiver Extension AR-15 Mil-Spec 7075 T6 Aluminum Black
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The RE-1 receiver extension allows you to mount a Mil-Spec stock on a civilian carbine or convert your A2 style fixed buttstock to a collapsible configuration. This receiver extension has five positions and corresponding white position numbers that are visible through the witness hole on most stocks. It is made from impact extruded 7075-T6 aluminum with hard coat anodized finish. It helps with snag-free sliding of the buttstock.