<p>The Aero Precision® M4E1 Pro AR-15 Semi-Auto Rifle leaves plain-jane MSRs in the dust with upgraded components inside and out to create the ultimate AR. Built around Aero's own forged 7075-T6 upper and lower, it features a cold hammer-forged, government-profile, chrome-lined barrel. The chrome-lined, phosphated M16 bolt carrier group runs smoothly and is built to handle full-auto. Fully ambidextrous controls make it easy to operate, and the Magpul® MOE SL stock and grip provide comfortable handling. ALG QMS single-stage trigger. 15" MOD 4 M-LOK® handguard. Mid-length gas system with low-profile gas block. Aero Precision enhanced buffer tube and H buffer. EZ install takedown/pivot pins.</p> <ul> <li class="">15" MOD 4 handguard with M-LOK slots</li> <li class="">Cold hammer-forged, government-profile, chrome-lined barrel</li> <li class="">Mid-length gas system with low-profile gas block</li> <li class="">Chrome-lined, phosphated M16 bolt carrier group</li> <li class="">ALG QMS single-stage trigger</li> <li class="">Magpul MOE SL stock and grip</li> <li class="">BREACH ambidextrous charging handle</li> <li class="">PRO ambidextrous safety</li> <li class="">Aero Precision enhanced buffer tube and H buffer</li> <li class="">EZ install takedown/pivot pins</li> </ul>