Couple of things here to consider. 1) In another 'suppressor' thread here on the 'Fire, John (Burns) of Wyoming Arms provided some info on their cans. Might worth the effort to search for that info. 2) A call to Wyoming arms would be a good idea. Might be that you'll find they use an 'industry standard' thread on the back end of the suppressor, thus permitting the use of either 5/8-24, 1/2-28, or QD mounts. Let us know what you find out.
On a similar note, there are companies out there that make adapters to go from 1/2-28 to 5/8-24. Personally, I'd be a little cautious of these, as they have the potential to 'stack' tolerances, which could end up with a baffle strike and/or a grenaded can.
