I have the PC version of one of these too (I cant remember which)... the trouble was I was using USB TopGuns which A) are pistols, not shotguns, and B) tend to 'drag' like a mouse rather than having the required 'flick & shoot' responsiveness of an arcade gun.
I just couldn't stand playing it without the proper shotgun, and as far as I know, there are no PC shotguns, at least not that would rival a proper shotgun from a BH cabinet? Hence the question of whether it could be interfaced to the PC somehow.