Black Rain Ordnance Inc. CNC machined upper receiver milled from 7075 billet aircraft grade aluminum with blacked out t-marks and M4 feed ramps. Gen. #2 Toned down edges of softer appearance overall with more snag resistance specifically in the shell deflector. Hard coat type III class 2 black anodizing MIL-A-8625. Made in the USA.
Determined at checkout.