Grizzly Shop Grizzly 18.2
Australian made muzzle breaks.
Outer Diameter = 18.2 mm
Thread Sizes Available = 5/8 x 24TPI and also available in 1/2 x 28TPI
Good universal size which can be turned down to suit slightly smaller barrels.
Good for new Lithgow models post 2018 (use 1/2 x 28TPI for 308 and 243)