So are there a lot of can's that would work for one of these?

Almost all of the big name suppressor manufacturers offer 3-lug adapters for their cans. SilencerCo, Rugged, Griffin Armament, Dead Air, etc. They normally don’t come with the suppressor; you buy the 3-lug adapter separately and use it to replace the booster piston or direct thread mount on the can. Only way to go on PCCs, IMHO.

Have the 3-lug for my Griffin Optimus, Rugged Obsidian, and DA Wolfman (when it gets out of jail).

Ok, thanks guys.

I use Griffin - they work great.

I put off getting a 3-lug for a long time, but finally got one for my Scorpion - man, it is awesome and works much better than a direct thread can.