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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.
| UPC | 815421022339 |
|---|---|
| Manufacturer | Aero Precision |
| Manufacturer Part Number | APAR600201AC |
| Product Type | Semi-Complete |
| Sights | None, Optic Ready |
| Caliber/Gauge | .223 REM/5.56 NATO |
| Style | Assembled |
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