Magpul Enhanced Receiver Extension Ar/ M4 BufferThe Magpul Enhanced Receiver Extension is a 7 position, Mil Spec sized, AR15 M4 profile buffer tube optimized to fit with the full line of Magpul Mil Spec Carbine Stocks. Constructed of impact extruded 7075 T6 aluminum with Type III, Class 2 hard coat anodizing for an extremely hard, abrasion resistant surface. The interior of the receiver extension features Everlube coating for enhanced corrosion resistance and reduced friction and wear. The
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