I wanted to compare the various DTK-2 Style brakes available for the AK platform at the moment. The original design is credited to Zenitco of the Russian Federation. Several U.S. Vendors have copied the design.

From left to right in photo one: Copy made by Dnepr0mike on theAKforum w/ 24m threads, Original Zenitco w/ 24m threads, Copy made by Palmeto State Armory w/ 24m threads, and Original Zenitco w/ 14m threads. The Palmetto copy is featured in photo two on an AK104-type firearm. Original pictured below the firearm for reference. We will take each of these for a whirl, and report back at some point in the future.