The M4E1 upper receiver is a one-piece design combining the handguard mounting platform with the upper itself. It is machined from 7075-T6 aluminum with, M4 feedramps, .250 takedown pin holes, and supports barrels with a diameter up to 1". Included is a barrel nut and wrench, port door, and forward assist. NOTE: This upper is not piston-kit compatible. Requires charging handle, barrel, handguard, gas block, muzzle device, gas tube and BCG (Bolt Carrier Group) to complete.
| FireArm |
No |
| Caliber |
5.56x45mm NATO |
| Handguard Finish |
Black Hard Coat Anodized |
| Type |
Semi-Complete |
| Receiver Finish |
Black Anodized |
| Sights |
None, Optic Ready |
| Receiver Description |
7075-T6 Aluminum |
| Handguards |
Free-Floating |
