Aero Precision Ar-15 Assembled Upper Receiver 20" 5.56mm Rifle Length - Ar-15 Assembled Upper Receiver 20 Rifle Length W/ Fsb
Aero Precision's AR-15 5.56mm 20" Rifle Upper Receiver closely resembles the U.S. military's M16A4 flattop upper and it comes fully assembled. It lacks only a bolt/carrier group and charging handle - two components many AR-15 fans prefer to customize based on their needs (this is America darn it, we have freedom of choice!). The AR-15 5.56mm 20" Rifle Upper Receiver features a barrel of high-grade 4150 chrome-moly carbon steel with 1-7" rifling and a tough, corrosion- and scratch-resistant black QPQ finish. The full 20" length gives you the extra velocity to reach out accurately to distant targets with both military 5.56mm NATO and civilian .223 Reming Mfg: Aero Precision