Aero Precision - M5 16" .308 CMV Complete Upper Receiver w/ R-ONE Handguard

The Aero Precision M5 Complete Upper Receiver with a 16" .308 CMV Barrel and R-ONE Handguard is a high-performance solution built for strength, modularity, and sleek ergonomics. Designed for AR-308 platforms, this upper features Aero's lightweight R-ONE handguard with the proprietary ATLAS mounting system — offering rock-solid stability and plenty of space for accessories without unnecessary bulk.

This upper is fully assembled and includes a mid-length gas system, low-profile gas block, and your choice of handguard length. It’s ready to mount on any DPMS High Profile (.210) AR-308 lower receiver. BCG and charging handle are sold separately and can be added under the Finish Your Build tab.

Includes:

• M5 Assembled Upper Receiver
• ATLAS R-ONE Handguard (user-selected length)
• 16" .308 CMV Barrel – Mid-Length Gas System
• Low Profile Gas Block and Mid-Length Gas Tube
• Fully assembled, ready for mounting

Upper Receiver Features:

• 7075-T6 forged aluminum construction
• M4 feedramps
• .2795 takedown pin holes
• Laser-engraved T-marks (anodized only)
• DPMS High Profile (.210) tang
• Includes forward assist and port door

ATLAS R-ONE Handguard Features:

• Lightweight, slim profile handguard design
• Durable ATLAS mounting system for strength and rigidity
• Full-length top Picatinny rail
• QD sling sockets at 3, 6, and 9 o’clock positions
• Internal Diameter: 1.5"
• Outer Diameter: 1.75"
• Compatible with DPMS High Profile (.210) AR-308 uppers

Barrel Specifications:

• Length: 16"
• Twist Rate: 1:10
• Material: 4150 CMV (Chrome Moly Vanadium)
• Finish: QPQ corrosion-resistant treatment
• Thread: 5/8 x 24
• Gas System: Mid-Length
• Gas Block Journal: .750
• Weight: 36 oz
• DPMS barrel extension
• HP and MPI tested for quality assurance

Additional Details:

• Made in the USA
• Platform: M5 (AR-308)
• Caliber: .308 Winchester
• Series: R-ONE/S-ONE
• Available Finishes: Black Anodized, Magpul FDE Cerakote, OD Green Anodized, Kodiak Brown Anodized