Dead Air Armament Xeno Radial Brake 5/8"-24 (.30 Cal) - DA870 - UPC 810128164481
Product Description
The Dead Air Armament Xeno Radial Brake 5/8"-24 (DA870) is a high-performance muzzle device and suppressor mounting interface designed for .30 caliber rifles (.308 Win, 300 AAC Blackout, 6.5 Creedmoor, .300 Win Mag). Engineered for the Dead Air Xeno mounting system, the Xeno Radial Brake features a non-directional 360-degree radial port pattern that delivers effective recoil reduction and muzzle control without requiring precise timing or shims during installation.
Utilizing Left-Hand (LH) coarse threads, the Xeno mounting architecture completely eliminates the risk of unthreading the muzzle device from the barrel when removing a carbon-locked silencer. The left-hand threads ensure that as you unthread a right-hand rotating suppressor adapter, the muzzle device torque against the barrel shoulder actually tightens, preventing accidental loosening.
Precision-machined from 4140 steel and finished in a severe-duty black nitride coating, the DA870 incorporates a primary taper seal positioned forward of the mounting threads. This taper design seals propellant gases inside the blast chamber, keeping mounting threads completely free of carbon buildup and copper fouling. Ultra-compact and lightweight, the Xeno Radial Brake is an ideal host mounting solution for precision bolt-action rifles, AR-10/SR-25 platforms, and hunting setups.
*Armorer Bench Notes & Real-World Staging Guidance:
Fitment Matrix: Fits barrels threaded in standard 5/8"-24 TPI with bore clearance for up to .30 caliber projectiles (.308, 300 BLK, 6.5mm, 6mm). Pairs seamlessly with the Dead Air Xeno Adapter (DA455) and Xeno-equipped silencers (Nomad, Sandman, Sierra-5, Primal, Wolfman, etc.).
- Verify the firearm is completely clear, safe, and unloaded before servicing.
- Clean barrel muzzle threads and shoulder thoroughly to remove debris and old threadlocker.
- Because of its 360° omnidirectional radial port design, no timing or shims are required. Apply non-permanent high-temp threadlocker (e.g., Rocksett) to barrel threads and torque the DA870 directly to 20–25 ft-lbs using a 3/4" wrench on the rear flats.
Key Features
- Non-Timed 360° Radial Braking: Multi-port radial design tames recoil impulse evenly in all directions without requiring timing shims or clocking.
- Left-Hand Thread Mounting Architecture: Left-hand coarse threads prevent the muzzle brake from unthreading from the barrel when detaching suppressors.
- Forward Taper Gas Seal: Tapered mating surface sits in front of threads to block carbon fouling and prevent carbon-locking.
- Nitride Coated 4140 Steel: Heat-treated alloy steel construction with a corrosion-resistant black nitride finish for long baffle/bore life.
- Compact & Lightweight Profile: Adds minimal length and weight (~2.6 oz) to the muzzle for optimal balance on hunting and precision setups.
Product Specifications
- Brand: Dead Air Silencers / Dead Air Armament
- Model: Xeno Radial Brake 5/8"-24 (.30 Cal)
- MPN: DA870
- UPC: 810128164481
- Thread Pitch: 5/8"-24 TPI
- Caliber / Bore Clearance: .30 Caliber (Up to .300 Win Mag / .308 Win / 300 BLK)
- Mounting System: Dead Air Xeno System (Left-Hand Threads)
- Material: 4140 Alloy Steel
- Finish: Black Nitride
- Length: ~1.73 inches
- Mass: ~2.6 oz (73.7 g)
