I'm am selling 2 act labs PC light guns, each with a VGA box. I bought these for my MAME cabinet but could not get them calibrated. I went back and forth with ACTLabs a few times, and they seemed to think the problem was my video card. Basically more than a few inches from the screen, aim was off to high and too far right.
I got frustrated trouble shooting these pretty quick and hope somebody else can make them work.
Selling both as is for 50 bucks shipped in the continental US.