Aero Precision APCR640439 M4E1 223 Rem/5.56 NATO 30+1 16 Black QPQ Heavy Threaded Steel Barrel, Black Anodized Receiver, 15 ATLAS R-ONE M-LOK Handguard, Black Synthetic Magpul SL Stock, Black Magpul Grip, Rifle

The Aero M4E1 Rifle is built on Aero's Enhanced Series Upper Receiver. Featuring a custom integrated upper receiver and handguard system, the shooter is provided a light-weight, free-floated rigid design. Superior performance and accuracy is the result in every M4E1 Complete Rifle.