Written on: by jimmanyk (11 reviews written)
I got the mk4 from combro with the interface and alignment tool.
if you have usb only computer you will need a 9 pin serial to usb converter. the alignment tool also has a built in led torch.
on the cronoscope.com webpage is the software to download plus some other useful information :- repair vids, calibration values, online converters for calibration and a power - velocity calculator. fits parallel barrels, silencers only.
£56.40 in total is better than however may years it is this week!