Nikonov AN-94

I heard that the muzzle break for the FN SCAR was designed using computer fluid dynamics - Fluent program.
The Nikonov muzzle break looks unusual. I bet the Russians have used CFD as well, considering the future importance of these parts will make a difference.
 
The muzzle brake also includes a "sonic whistle". Basically a hole that changes the frequency of the muzzle blast, allegedly making it less damaging to hearing. Apparently Health and Safety wasn't quite so important back in Soviet times, and once they went to using muzzle brakes (AKM/AK-74), they started getting more hearing damage. Sounds wierd I know, but I read it in a Shotgun News article.
 
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