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Big .338 rifles hit hard on both ends, and the Dead Air KeyMo Muzzle Brake does double duty to fix that. Run it bare and it works as a legitimately effective brake, flattening out recoil and muzzle movement with less side blast than a lot of traditional designs. When you're ready to go quiet, it becomes the mounting point for Dead Air's Sandman series suppressors, plus the Nomad-30 or Primal when they're wearing a KeyMo adapter. One muzzle device, two jobs, no wrench needed at the range.
This is the DA106 version, threaded M18x1.5 to the Accuracy International specification. That makes it the right pick for AI rifles like the AXMC and similar precision platforms running that metric thread pitch. The bore is sized for .338 caliber, so it pairs naturally with .338 Lapua Magnum builds where recoil management matters most. Worth knowing: because it's cut to the AI spec, it may not seat properly on barrels with unusually long thread shanks, so measure your tenon before ordering. Also note the M18 brakes ship without a shim kit, and this model does not include a pin and weld hole or the upper timing ports found on some smaller KeyMo brakes.
The smart part of the KeyMo system is the sealed taper that sits forward of the locking channels. Carbon can't creep into the interface and glue your suppressor to the mount, which is a real problem with some quick-detach systems after a few hundred rounds. Your can comes off as easily at round 1,000 as it did on day one, and it returns to the same position every time for consistent point of impact.
Dead Air machines this brake from 4140 heat-treated alloy steel and finishes it in black nitride for wear and corrosion resistance. It measures 2.82 inches long and weighs in around 4.1 ounces, adding minimal bulk to an already long precision barrel. It's a well-made piece from a company that built its reputation on suppressor mounting done right.
It directly mounts Dead Air's Sandman-L, Sandman-S, and Sandman-K suppressors. It also works with the Nomad-30, Primal, and other Dead Air cans once they're fitted with a KeyMo adapter. Any suppressor built around the KeyMo interface will lock onto this brake.
This brake is machined to the Accuracy International M18x1.5 thread specification, so it's the correct choice for AI rifles and barrels cut to that spec. Some barrels with extra long thread shanks, like certain Faxon barrels, won't allow it to seat properly. Double check your thread length and pitch before ordering, and note the M18 versions do not ship with a shim kit.
Yes, that's half the point of it. Run bare, it functions as a genuinely effective muzzle brake that flattens recoil and muzzle rise on hard-kicking .338 rifles, with less concussion than many conventional brake designs. You get real recoil reduction now and a quick-detach suppressor mount whenever you're ready.
Dead Air positions a sealed taper forward of the KeyMo locking channels, which blocks carbon fouling from building up in the interface. That means the suppressor comes off smoothly even after high round counts, without the stuck-can wrestling match some quick-detach mounts are known for. It also helps the can return to a repeatable position for consistent zero.
| UPC | 810128160421 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | DA106 |
| Caliber/Gauge | .338 Caliber |
| Model | |
| Shipping Weight | 0.275 |
| Thread Pattern | M18X1.5 |
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