Sputnik muzzle brake for AR-15

Legendary Sputnik muzzle brake which has a time proven efficiency on all types of AK rifles was modified to fit AR-15. It was not difficult to create muzzle brake for AR-15 because 5.45 and 5.56 ammunition is similar and has almost identical muzzle energy.
We have tested it on AR-15 with 10.5 and 14.5 inch length of the barrel. Sputnik is too powerful for short barrels but works perfectly on 14.5 and longer barrels. In Ukraine, this muzzle brake used many professional shooter.