Aero Assembled Upper Receiver + Toolcraft Black Nitride Bolt Carrier Group
Save big on this Aero Assembled Upper + Toolcraft Black Nitride BCG Combo!
Toolcraft Black Nitride MPI BCG:
This Toolcraft MPI inspected Black Nitride BCG comes with a lifetime warranty and is perfect for any AR15, M4 or M16 Build. Toolcraft carriers and bolts are build to military specifications, also known as "Mil-Spec" and they are known throughout the industry as some of the best.
Toolcraft Bolt Carrier Groups come with a lifetime warranty!
Aero Precision Assembled M4 Upper Receiver:
- Enhanced 9310 Steel (Bolt)
- 8620 Tool Steel (Carrier)
- Mil-Spec Extractor Spring, black extractor insert, Viton O-Ring
- Tool Steel Extractor
- Shrouded Firing Pin
- Mil-Spec Gas Key (4130 Steel) attached with Grade 8 hardware and Properly staked
- Caliber: .223 / 5.56 / 300 Blackout
- Bolt is shot Peened and MPI