Aero Precision M4E1-T Complete Upper 12.5" 5.56 Carbine - AER APAR700703M30

This is a complete AR-15 upper receiver assembly featuring an M4E1 threaded upper receiver paired with a 12.5" barrel and a 10.3" M-LOK ATLAS S-ONE handguard. The handguard uses Aero Precision's proprietary ATLAS attachment system for a slim profile with maximum strength and stability, ideal for lightweight builds.