AERO M4E1-T PRO UPPER RECEIVER GROUP 14.5 Black

Aero Precision M4E1 Threaded Assembled Upper Receiver, Black

Aero Precision Threaded Upper Receiver M4E1 5.56 11.5 inch Barrel 9 inch M-LOK ATLAS R-ONE Handguard A2 Flash Hider Anodized Black

Aero Precision M4E1-T Upper 5.56 14.5 Barrel No BCG/CH

Aero Precision M4E1 Enhanced 10.5 5.56 Barrel Complete Upper Receiver

Aero Precision M4E1 Threaded .300 Blackout Complete Upper Receiver 10in 1-7 Twist 5/8x24 Thread ATLAS R-ONE Handguard FDE Cerakote

Aero Precision AR-15 M4E1-E Upper Assembly 5.56x45mm NATO 13.9" Barrel 12.7" ATLAS R-ONE Handguard Black

Aero Precision Complete Upper Receiver M4E1-T RM12.7 5.56x45mm NATO 13.9in Government Mid Length 1 in 7 1/2 x 28 12.7in A2 Flash Hider Cerakote FDE