Blackout Defense KeyMo Hybrid Muzzle Brake

Flash control. Gas redirection. Suppressor-ready.

The Blackout Defense KeyMo Hybrid Muzzle Brake is purpose-built for shooters who demand more than just recoil reduction. This high-performance device combines flash hiding, gas redirection, and suppressor compatibility with rugged materials and elite machining.

Compatible with Dead Air’s KeyMo mount system, this brake tames blast, keeps carbon in check, and sends gas forward—not in your face. The closed-prong front eliminates tuning fork ping, and precision jet port placement improves recoil mitigation without compromising durability.

Further Intel:

• In-house heat treated to condition H900 for a through-hardness of 45-47 HRC
• 17-4 stainless steel that is heat treated to condition H900 exhibits 14% higher ultimate tensile strength over hardened 4140 steel
• Every 90º corner is machined with undercut profiles to improve seal and engagement with the suppressor
• 4 jet ports drilled at 51 degrees to direct gas forward and away from the shooter
• 2 jet ports at 12 o’clock, 1 at 4 o’clock and 1 at 8 o’clock
• Recessed jet ports with a flat face to reduce carbon buildup on the device and improve ease of separation with a suppressor
• Forward-directed gas reduces muzzle rise, softens recoil, and pushes all explosive gasses away from the shooter
• Closed-prong design reduces flash and eliminates tuning-fork “ping”
• Shim kit included

Technical Specifications:

• Bore Diameter: 8.5mm (1/2X28) or 9mm (5/8X24)
• Thread Pitch: 1/2X28 or 5/8X24
• Material: 17-4 Stainless Steel
• Finish: H900 Raw or Black Nitride 

What's in the Box:

• Blackout Defense KeyMo Hybrid Muzzle Brake
• Shim Kit