Vision Vulcan gen2 .264/6.5mm muzzle brake

Won this in a match earlier in the year, finally got around to trying to install it and realized the threads are wrong for my rifle.

Unit uses M18x1 threading instead of 5/8x24.

Looking to sell it for $275 or trade it for a similar style and size muzzle brake in 5/8x24 threading.

Please feel free to message me with any questions or for more pictures.