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The Advanced Armament Corp BLACKOUT provides excellent Recoil reduction. It is constructed from an aerospace grade heat treated 17-4 stainless steel and is nitride coated for high surface hardness and durability. In addition to all the features that this muzzle brake offers, it provides you with the added benefit of being able to attach your suppressors quickly using the Ratchet Mount system. 

Specifications and features:
Advanced Armament Corp BLACKOUT 90T Taper Muzzle Brake 104035
5.56mm caliber barrels threaded in 1/2x28 TPI
Nitride finish
90 Tooth Taper Ratchet mount for AAC sound suppressors Only
Package includes shim and Rocksett for Installation
17-4 Steel
Matte Black