Aero Precision M4E1 Threaded Complete Upper, 20\" 6.5 Grendel SS Barrel, ATLAS S-ONE 15\" M-LOK HG - Anodized Black - APAR700325M53

Aero Precision

Overview

The Aero Precision M4E1 Threaded Complete Upper is a fully assembled upper receiver designed for the AR-15 platform, featuring a 20" barrel chambered in 6.5 Grendel. The upper is crafted from billet aluminum, offering a robust yet lightweight structure, while the M4E1 receiver type ensures compatibility with a wide range of AR-15 components. This upper is commonly integrated into builds that prioritize precision shooting and long-range capabilities, although it’s worth noting that the majority of builds in the GPP data utilize the 5.56 NATO caliber.