Dead air absolutely r***s you on attachments...make sure you look at prices.
Second, while you "can" run a wolfman on a pistol, its so heavy and big I guarantee you wont really want to. That $250 on adapter and piston would be better spent on a dedicated 9mm pistol can like an obsidian 9 or mod9.
I am learning this quickly, sadly. the amount of **** I have to buy to hook these cans up is insane.
might just buy a fixed barrel 9mm now. I originally wanted the Obsidien 9, but my FFL informed me they were out of stock at that time. Recommended the 45 instead and passed opting for the wolfman.
no worries, I will find a use for it. Just damn though