Aero Precision M4E1 Enhanced 8" .300 Blackout Quantum Handguard Complete Upper Receiver - APAR640101M1

This Complete Upper includes Aero Precision’s 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. This assembly does not include BCG or Charging Handle.

Includes:

• M4E1 Enhanced Assembled Upper Receiver
• 7″ Quantum Handguard
• 8″ .300 Blackout CMV Barrel
• Low Profile Gas Block and Pistol Length Gas Tube
• Product comes assembled
• The muzzle brake that comes with this complete upper receiver is NOT pinned nor welded to this barrel.

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
• 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

8″ .300 Blackout Barrel Features:

• Length: 8″
• 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: .109
• Gas System Length: Pistol
• Weight: 18oz
• M4 Barrel Extension
• HP and MPI Tested

Specifications:

• Caliber/Gauge .300 Blackout
• Barrel Length 8″
• Barrel Twist 1:7
• Barrel Finish QPQ Corrosion Resistant
• Firearm Fit AR-15
• Threaded Barrel Yes