Similar to a Bulgarian brake with but its not half moon or zig zag cut, etc, this is just 4 drilled holes like the old Tapcos. Fitment on PAP M90 using CNC warrior M14 adapter is awful. The slight rotation is like my others but this thing has ~2mm of vertical play. When maneuvering with the rifle you can hear the brake wobble. Was removed after one range session.
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1 of 1 people found the following review helpful:
Really close match to a Bulgy brake
July 7, 2017
Reviewer:
Chris from Raleigh, NC United States
I got this to throw on a 300 BLK AR15 SBR and it works as expected. Has the full expansion chamber unlike the other US copies and correct hole spacing so it has the compensating effect of the bulgy one. It also fits my Bulgy AK74 just fine as well. I've had no issues in the few years I've used it.
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3 of 5 people found the following review helpful:
Great Brake
December 18, 2013
Reviewer:
Brian Smith from Omak, WA United States
Needed one more part for my Bulgarian 74 build. Ordered this and am not disappointed. Well made, fit perfect, arrived quickly and was inexpensive. Overall a great product and company. Very satisfied customer.
Not a Bulgy and not worth it. 
Really close match to a Bulgy brake