The 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 additional position holes allow for more length-of-pull fitment options while retaining a standard length for the tube.