Davidson Defense Phasebreak 16" 8.6 BLK AR-10 Rifle Build Kit, Suppressor Ready, 1:3 Twist, M-LOK

Phasebreak 16" 8.6 Blackout AR-10 Rifle Build Kit, Suppressor Ready

This is a complete AR-10 rifle build kit chambered in 8.6 Blackout, a cartridge designed for subsonic performance and suppressor compatibility. The kit includes everything except the serialized lower receiver, with a 16-inch SOCOM profile barrel in a carbine-length gas system, a freefloat M-LOK handguard, and a Recoil Technologies nitride BCG. The suppressor-ready muzzle thread and adjustable gas block make this setup ideal for users planning suppressed shooting.

Key Features

• 16-inch SOCOM profile barrel, 1:3 twist rate, M18x1.5 muzzle thread
• Freefloat 15-inch M-LOK handguard with low-profile design
• Carbine-length gas system with adjustable low-profile gas block
• Recoil Technologies nitride LR-308 bolt carrier group
• Recoil Technologies lower parts kit with mil-spec quality
• Mil-spec heavy-duty buffer tube, LR-308 buffer, and extra-power spring
• SOPMOD-style collapsible stock with storage compartments and QD mounts
• DPMS pattern compatibility with .308 Winchester, 6.5 Creedmoor, and .243 Winchester

Perfect For

• Shooters building a suppressed long-range or hunting rifle
• Users wanting a shorter, lighter AR-10 platform in a modern cartridge
• Builders seeking a complete upper and lower parts kit solution
• Precision shooters needing freefloat accuracy without assembly

Suppressor-Ready Design

This kit ships configured for suppressed shooting. The 16-inch barrel and carbine-length gas system are tuned for subsonic ammunition performance, and the M18x1.5 muzzle thread accepts standard suppressors. The adjustable gas block allows fine-tuning for both supersonic and subsonic loads, which is essential when running a suppressor. This configuration prioritizes reliability and consistency when using sound-reducing equipment.

8.6 Blackout Platform

The 8.6 Blackout is purpose-built for suppressed fire. This cartridge delivers subsonic velocities naturally, reducing the need for specialized ammunition. The 1:3 twist rate stabilizes heavier projectiles common in subsonic loads, and the SOCOM profile barrel provides durability without excessive weight. This is a modern alternative to 300 Blackout for shooters wanting more velocity and range while maintaining subsonic capability.

Freefloat Accuracy and M-LOK Modularity

The 15-inch freefloat handguard isolates the barrel from shooter input, improving accuracy by removing contact pressure variables. M-LOK attachment points allow mounting lights, lasers, or other accessories without tools. The low-profile design keeps the rifle compact and lightweight while maintaining full accessory compatibility.

Recoil Technologies Components

The nitride-finished bolt carrier group and mil-spec lower parts kit provide reliability and consistency. The extra-power 17-7 stainless steel buffer spring is made in the USA and designed for the heavier recoil impulse of the 8.6 Blackout cartridge compared to standard 308 Winchester loads.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Verify suppressor compatibility before use. Ensure secure mounting before operation. Lower receiver not included.