The Sanders Armory AR-15 .450 Bushmaster BILLET Side Charging Receiver Assembly is a custom receiver made from 7075 T6 Grade Billet Aluminum with Mil-A-8625 Type III Hard Coat Anodized Finish and M4 Feed Ramps. This side charging upper receiver assembly will fit and accept any Mil-Grade/Mil-Spec lower receiver and barrels. The Bolt Carrier Group (BCG) is a dedicated custom Side-Charging AR-15 .450 Bushmaster Nitride Bolt Carrier with Mil-Spec AR-15 .450 Bushmaster bolt head. The Bolt is “true” Mil Spec dimension and external surfaces are CNC ground after heat treat for a precision fit and made with case Hardened 9310 Steel with Phosphate per MIL-STD-171, Hardened 4340 cam pin, Mil Spec firing pin made of 8740 steel, center-less ground and Hard Chrome coated, custom Side-Charging Handle is fortified and made of 4140 Chrome Moly with a Nitride Finish. Made in the USA!
Billet Side Charging Upper Specs:
- 7075-T6 Billet Aluminum
- Mil-A-8625 Type III Class 2 Hard Anodized Finish
- M4 Feed Ramps
The AR15 .450 Bushmaster Nitride BCG Features:
- 9310 Steel MPI tested bolt
- 8620 Steel Carrier
- Keys are made from 4130 Steel
- Black Nitride Finish on Carrier
- Requires light lubrication for maximum efficiency, easy to clean.
- Includes Crane O ring
- AISI 9310 VAR (vacuum arc remelt) moly, nickel steel
- Beveled locking surface
- Carbon/fouling relief area for high fire rates
- Phosphate per MIL-STD-171
NO shipping to District of Columbia (Washinton, D.C.), Massachusetts, Connecticut, Chicago, Cook County, Deerfield, Highland Park or Aurora Illinois, New Jersey, New York, Puerto Rico, Hawaii, Alaska or Canada! NO international shipping all must be within the 48 Contiguous United States! NO APO/PPO/FPO’s.