This thread adapter allows you to run an EC Tuner on your 5/8-24 threaded barrel. Perfect for rimfire, hunting, or even competition barrels where brakes are not required.
The thread adapter has flats on it that allow you to set it tight on your barrel. The flats are hidden once EC Tuner is installed.
The thread adapter is also long enough to shield the EC Tuner from any gasses from barrel keeping the tuner clean and free of carbon build up that could affect tune.