M4 Flat Top Anodized Upper Receiver - (Only Upper is BLEM) - Combo with Complete 5.56 Polished Black Nitride BCG
***Limited Blemished Batch * 100% Functional***
Machined from 7075 T6 forgings, this upper receiver features a mil-std 1913 rail for mounting optics and accessories and has M4 feed ramps.
- Machined from a Mil-Spec 7075 T6 forcing hard Coat Anodized per Mil-A-8625F, Type III
- M4 Feed ramps
- Made in the U.S.A
These uppers are Cosmetically Blemished. The metal under the port door opening has surface imperfections rendering these cosmetically blemished.
Bolt Carrier Group:
- 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
- All BCG components are pre-polished before being processed and then post polished for an incredible shine
Add a plain or engraved port door + forward assist kit from the drop-down menu.
Choose one of our upper engraving graphics from the drop-down menu.