NiB-X A3/A4 Upper Receiver w/M4 Feed Ramps, Forged, 7075 T6 Mil Spec forging with M4 feed ramps. Ideal building block for a long lasting AR15. This 7075 T6 Aluminum forged Mil Spec receiver with M4 feed ramps has NiB-X coating inside and out to provide an exceptionally tough, ultra-smooth surface finish for outstanding wear resistance and lubricity.
Specifications:
- Forged AR-15 Upper Receiver
- NiB-X Finish