Aero Precision M4E1 Upper Receiver Complete .300 Blackout 8" Barrel Black

Aero Precision M4E1 Upper Receiver Complete .300 Blackout 8" Barrel Black

This complete upper includes Aero Precision’s new ATLAS S-ONE Handguard! The S-ONE line of handguards are designed with size and weight in mind, providing the perfect addition to your lightweight build. Their proprietary ATLAS attachment system is a durable and dependable mounting platform, maintaining a slim profile while still providing the strength and stability customers have grown to love from Aero Precision handguards.

M4E1 Threaded Assembled Upper Receiver
7"" M-LOK ATLAS S-ONE Handguard with 8" .300 Blackout CMV Barrel
Low Profile Gas Block and Pistol Length Gas Tube in all makeups.
This complete upper 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.
M4E1 Threaded Upper Receiver Features:

New enhanced forging that gives the upper receiver a ""billet look""
New picatinny profile that blends seamlessly with our Enhanced Series Handguards
M4 Feedramps
.250 takedown pin holes
Laser engraved T-marks
Includes port door and forward assist installed
ATLAS S-ONE Handguard Features:

Front and rear picatinny rail
Eliminated center of top rail for weight reduction
Indexing grooves in 12:00 position for positive grip control
Quick disconnect sling socket at the 3, 6 and 9 o'clock positions
Compatible with low profile gas blocks
1.3” Inside diameter
1.5” Outside diameter
Compatible with mil-spec AR15 upper receivers and barrels
8"" .300 Blackout Barrel Features:

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