(0) Total $0
Aero Precision 10" M4E1 300BLK AR15 Upper 9" ATLAS R-ONE MLOK .300 Blackout M-LOK
Aero Precision 10' M4E1 300BLK AR15 Upper 9' ATLAS R-ONE MLOK .300 Blackout M-LOK

Aero Precision 10" M4E1 300BLK AR15 Upper 9" ATLAS R-ONE MLOK .300 Blackout M-LOK

Part Number:APAR700702M4
On sale: $506.99
Retail Price:$539.99
You Save:$33.00(6%)
In Stock.

Choose Options

One 5 Slot Aluminum Magpul Rail [+$18.95]
Two 5 Slot Aluminum Magpul Rails [+$36.95]
Three 5 Slot Aluminum Magpul Rails [+$53.95]
Add Milspec Charging Handle [+$13.95]
Add VTS Milspec Nitrided BCG [+$99.95]
Add Aero Ambi Charging Handle [+$74.95]
Add Aero Nitrided M16 BCG [+$159.95]
Add Brownells M16 Titanium Nitride BCG [+$199.95]
Aero Precision 10" M4E1 300BLK AR15 Upper 9" ATLAS R-ONE MLOK .300 Blackout M-LOK


This complete upper includes our new ATLAS R-ONE Handguard! The R-ONE handguards are designed with size and weight in mind, while still providing plenty of real-estate to accommodate any attachment needs the end user may have. Our 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 Enhanced Assembled Upper Receiver
9" ATLAS R-ONE MLOK Handguard
10" .300 Blackout CMV Barrel
Low Profile Gas Block and Pistol Length Gas Tube
Product comes assembled
This complete upper does not include BCG or Charging Handle unless Added. 

M4E1 Upper Features:
Forged from 7075 T6 aluminum
Precision machined to M4E1 specs
M4 feedramps
FDE Cerakoted Mil 8625 Type 3 Class 2
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

ATLAS R-ONE Handguard Features:
Full top picatinny rail for optional attachments
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

Barrel Features:
Chamber: .300 Blackout
Length: 10"
Material: 4150 Chome Moly Vanadium
Finish: QPQ Corrosion Resistant Finish
Gas System Length: Pistol
Gas Block Journal: .750"
Twist Rate: 1:7 Inches
Muzzle: 5/8x24 Threaded
Weight: 21oz
Other; M4 Feed Ramp Extension, HP and MPI Tested, Standard A2 Flash Hider

Shipping to FFL Dealer RequiredNo
Made In America?Yes
Caliber.300 Blackout
Barrel Length10"
Weight(s)2lbs 8.6oz

Related Items

Product Name
Subtotal: $0
Browse By Category
Browse By Price