Aero Precision M4E1 Assembled AR 15 Upper Receiver 5.56x45mm Mid-Length 16 Barrel

Aero Precision M4E1 Assembled AR 15 Upper Receiver 5.56x45mm Mid-Length 16 Mid Length Barrel EM-15 Gen 2 M-LOK Handguard Anodized Black Features: Aero Precision assembled anodized black upper receiver from 7075-T6 forged aluminum. Includes a mid-length gas system an EM-15 handguard with continuous top rail. Threaded 16 barrel in 5.56 in 1:7 twist and M4 feed ramp. Aero Precision M4E1 Assembled AR 15 Upper Receiver 5.56x45mm Mid-Length 16 Mid Length Barrel EM-15 Gen 2 M-LOK Handguard Anodized Black Specfications: Manufacturer Aero Precision Mfg. Part Number APAR640251M7 UPC 815421023305 Caliber/Gauge 5.56x45 Action Semi Automatic Barrel Length 16 Barrel Twist 1:7 Firearm Fit AR-15 Threaded Barrel Yes