Aero Precision APAR600201AC M4E1 Enhanced Upper Receiver 5.56x45mm NATO 7075-T6 Aluminum Black Anodized Receiver for AR-15
Due to the unprecedented volume of sales of firearms, ammunition, and accessories we CANNOT guarantee immediate shipping and fulfillment of web-orders. The average lead time for order fulfillment for firearms, ammunition and accessories is 3-8 weeks but you will get EXACTLY what you ordered.
Our inventory at our Livonia MI retail location remains strong and we encourage you to come by if you desire a product immediately.
The M4E1 upper receiver is a one-piece design combining the handguard mounting platform with the upper itself. It is machined from 7075-T6 aluminum with, M4 feedramps, .250 takedown pin holes, and supports barrels with a diameter up to 1". Included is a barrel nut and wrench, port door and forward assist. This model has a black hardcoat anodized finish. NOTE: This upper is not piston-kit compatible.