Description

SKU APAR640112M4
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.

Includes:
M4E1 Enhanced Assembled Upper Receiver
Quantum Handguard of choice
10" .300 Blackout CMV Barrel
Low Profile Gas Block and Pistol Length Gas Tube
Product comes assembled
This assembly does not include BCG or Charging Handle. These products may be selected as add-ons under the FINISH YOUR BUILD tab
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.
M4E1 Upper Features:
Forged from 7075 T6 aluminum
Precision machined to M4E1 specs
M4 feedramps
Matte black hard coat anodized Mil 8625 Type 3 Class 2
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
Quantum Handguard Features:
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: 5/8x24 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
SPECS
Specs
Shipping to FFL Dealer Required No
Made In America? Yes
Platform AR15
Series M4E1
Caliber .300 Blackout
Barrel Length 10"
Weight(s) KeyMod: 44 oz / M-LOK: 44 oz

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