This Complete Upper includes our Quantum Handguard! Key features include the addition of built in anti-rotation tabs, removable 4-slot picatinny rail section for front sight and a 7 mounting surface for accessories.
M4E1 Threaded Upper Receiver Features:
- Forged from 7075 T6 aluminum
- Precision machined to M4E1 specs
- M4 feedramps
- FDE Cerakote finish
- Laser engraved T-marks (Anodized only)
- Comes assembled, with port door and forward assist installed
- Accepts standard AR15/M16 components
- Handguard mounting platform is forged into the receiver
- Works with Aero Precision handguards but also fits most BAR-system handguards
- Barrel nut and wrench are included
Complete Upper Includes:
- M4E1 Enhanced Assembled Upper Receiver
- Quantum Handguard of choice
- 10″ .300 Blackout CMV Barrel
- Low Profile Gas Block and Pistol Length Gas Tube
- Comes assembled
- This assembly does not include BCG or Charging Handle.
- The muzzle brake that comes with this complete upper receiver is NOT pinned nor welded to this barrel. Per the National Firearms Act, the muzzle brake MUST be pinned and welded to achieve the necessary 16″ as defined by the ATF for a rifle build.
Quantum M-Lok Handguard:
- 1pc free float design
- Removable 4-slot picatinny rail section for front sight
- Built in anti-rotation tabs
- 7 mounting surfaces for KeyMod accessories
- 1.78″ inside diameter fits most muzzle devices and 1.5″ suppressors
- Compatible with low profile gas blocks
10″ .300 Blackout Barrel Features:
- Length: 10″
- Twist: 1 in 7
- Muzzle: 5/8×24 Threaded
- Material: 4150 Crome Moly Vanadium
- Finish: QPQ corrosion resistant finish both inside and out
- Gas Block: .750
- Gas Port: .0935
- Gas System Length: Pistol
- Weight: 21oz
- M4 Barrel Extension
- HP and MPI Tested
SKU: APAR308505AC
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