Aero Precision M4E1 Threaded Complete Upper Receiver 5.56 NATO 14.5 in Barrel Government Profile 1-7 Twist 1/2x28 Thread 12 in ATLAS R-ONE M-LOK

Aero Precision

Overview

The Aero Precision M4E1 Threaded Complete Upper Receiver features a 14.5-inch barrel chambered in 5.56 NATO, making it an ideal choice for builders looking for a compact yet versatile upper. With a 1:7 twist rate, this barrel is designed to stabilize a wide range of bullet weights, ensuring consistent accuracy whether you're using lighter varmint rounds or heavier defensive ammunition. The complete upper receiver is built on the M4E1 platform, which offers a modern aesthetic and improved functionality, making it suitable for a variety of builds, particularly those focused on tactical applications or lightweight configurations.