The M4E1 Threaded Upper Receiver features a new angular machined design that helps it stand apart from standard mil-spec upper receivers. This upper receiver features the same enhanced body profile as our M4E1 Enhanced Upper Receiver but is threaded to accept a standard AR15 barrel nut. It is forged from 7075-T6 Aluminum and precision machined to work with all mil-spec AR15 parts.
- New enhanced forging to gives the upper receiver a billet look
- New Picatinny profile that blends seamlessly with the Atlas Handguard
- M4 Feedramps
- .250 takedown pin holes
- Laser engraved T-marks
- Includes threaded forward assit roll pin
- Does Not include port door or forward assist