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.
This model has a black hardcoat anodized finish.
NOTE: This upper is not piston-kit compatible.
- Category : Uppers
- Type : Complete Gas Impingement
- Caliber : 223 Remington/5.56 NATO
- Sights : None, Optic Ready
- Receiver Description : 7075-T6 Aluminum
- Receiver Finish : Black Hard Coat Anodized
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