Davidson Defense 8.5" 5.56 NATO AR-15 Pistol Upper Receiver: Avagaum, 4150 CMV 1:7, 7" M-LOK Handguard

Avagaum 5.56 NATO Upper

The. White. Label. Avagaum delivers a compact, reliable upper assembly built on proven AR-15 platform fundamentals. This 8.5-inch configuration pairs a 4150 CrMoV nitride barrel with a 7075-T6 aluminum receiver and M-LOK handguard, creating a lightweight platform suited for shorter sight radius applications and confined spaces. The pistol length gas tube and low-profile gas block keep the profile minimal while maintaining reliable cycling.

Key Features

• 8.5-inch 4150 CrMoV nitride barrel with 1:7 twist rate
• 7075-T6 aluminum upper receiver with anodized finish
• 7-inch M-LOK handguard for accessory mounting
• Pistol length gas tube and low-profile gas block
• M4 feed ramp for reliable ammunition feeding
• Includes A2 flash hider and crush washer

Perfect For

• Compact AR-15 builds requiring shorter barrel profiles
• Shooters prioritizing maneuverability in tight environments
• Pistol caliber conversion platforms and SBR configurations
• Budget conscious builders seeking reliable components

Compact Upper Design

This 8.5-inch barrel strikes a balance between velocity retention and overall platform length. The government profile barrel maintains rigidity while keeping weight minimal. The 1:7 twist rate stabilizes a wide range of 5.56 NATO ammunition weights, from lighter 55-grain rounds to heavier 77-grain loads. The nitride finish provides corrosion resistance and durability without the cost of premium coatings.

M-LOK Accessory Ecosystem

The 7-inch M-LOK handguard delivers modern mounting flexibility without excessive length. M-LOK slots run the length of the handguard, allowing you to position lights, lasers, and vertical grips exactly where you need them. The 6061-T6 aluminum construction keeps the handguard lightweight while maintaining rigidity for accessory weight.

Gas System and Cycling

The pistol length gas tube paired with the low-profile gas block creates a compact gas system ideal for shorter barrel configurations. The 0.750-inch gas block diameter matches standard AR-15 barrel specifications. This setup cycles reliably while keeping the upper profile streamlined for close quarters use.

Included Components

The upper ships complete with an A2 flash hider threaded at 1/2x28 TPI and a crush washer for secure muzzle device attachment. The flash hider reduces muzzle signature and provides a standard mounting point for future suppressor or muzzle brake upgrades. No additional components are required to attach this upper to a compatible lower receiver.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. BCG and charging handle are not included.