Our Gyrex system, so named for the original helical port brake that induces a vortex in the blast chamber, was never originally intended for low pressure applications, but it became clear to us that we needed to support the pattern with more muzzle device options in more thread pitches. We released a single port brake some time ago, but that didn't solve the problem for pistol suppressors or other cans with short blast chambers. Due to demand, we began offering adapters in 1.125-28 Alpha pattern, 1.180-24 Gemtech/liberty pattern, 1.203-28 Dead Air P-Series, 1-7/16 20 D cell and for the Banish suppressors.
I finally got around to running these mini brakes, which will be a great solution for those suppressors with muzzle device length limitations, and also a lower cost alternative for pistol cartridges and low pressure rounds that do not benefit from the helix port brake like high velocity rounds do.
Gyrex Mini Brake I will be adding the thread patterns that are out of stock this coming week, so if the one you need isn't there, sit tight a minute! We can also enlarge bore size if needed at no charge on brakes that are only listed with smaller 9mm or .40 cal bore; just indicate that in the order notes.