A-Hole Mk4a™ Muzzle Brake

Rated 4.50 out of 5 based on 2 customer ratings
(2 customer reviews)


Our A-hole Mk 4a™ Muzzle Brake with our proprietary A-Hole Technology™ tames even the worst 223/5.56mm recoil. Make noise, not recoil. Let your freedom ring, loudly and proudly.



Have you ever been shooting your new AR at the range and failed to attract any attention?  Tired of the shoulder breaking, PTSD inducing recoil on your AR15 or other 223/5.56mm rifle?  Tired of expensive, overweight muzzle brakes ruining the balance of both your otherwise svelte 3 gun rifle and your checking account?  Well, there is now an affordable solution for you:  Our A-Hole Mk 4a™ Muzzle Brake.

We start, as we always do, with high quality, domestically produced 6061-T6 Aluminum so that weight stays low but service life is still excellent (3000+ rounds).  From there, we add our propriety A-Hole Technology™.  What is this you ask?  Through a combination of late night guesswork and non-hipster related irony we slaved away to create an effective and audibly recognizable port design.  Our A-hole technology allows muzzle blast gasses to be harnessed to help eliminate recoil and keep you on target for faster follow up shots, better split times and gain much, much more sex appeal.  No science or animals were harmed in the development of our A-Hole Mk 4a™ Brake.  To aid with installation we include a shim kit.  Yes, that’s right, a shim kit.  No crush washers, peel washers or some other, lesser method for timing your muzzle brake to be found here.  Just a sweet, made in America, reusable shim kit.  Our A-Hole Mk 4a™ Muzzle Brake was designed for the shooter that is very weight conscious with their rifle, for the competitor looking to ditch some weight at the end of their rifle or for the guy who just wants to let freedom ring to all with in earshot.


Silence is golden, duct tape is silver and loud guns are for A-Holes.



Note:  This brake is NOT rated for full auto fire.  Nor should it be used in a permanent installation.  Do not use thread locking compound when installing.  It is up to the user to ensure this muzzle device is properly installed. If you are uncomfortable installing this muzzle brake, take it to a qualified gun smith.  Installation instruction can be found here:


2 reviews for A-Hole Mk4a™ Muzzle Brake

  1. Rated 4 out of 5


    This thing is mean! I revied this bad mamba jahamba on my youtube channel and yeah, it mitigates recoil but boy does it rattle our jaw! For $30 you can’t go wrong.

  2. Rated 5 out of 5


    Received my A-hole brake in the mail the other day. Put the bad boy on and damn for the price this thing works great! The little extra noise is awesome to! The quality for the price and desgin is awesome. Thank you ARSON MACHINE! outstanding product for an outstanding price!!

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