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This 5/8x24 3 lug adapter is an HK pattern and will work with any 3 lug silencer on the market made to this standard. They will also work with Griffin 3 lug interface assemblies.
The 5/8x24 is meant to provide a 3 Lug mount to 30 caliber barrels but is also compatible with 9mm barrels where that thread is uncommonly used. Most 30 caliber barrels are threaded 5/8x24 thread pitch
Made from 17-4ph stainless and Melonite QPQ treated.