Hi,
since I am quite a gun-junkie I have made some spreadsheets to get a glimpse at the conversion of guns from SR 4 to SR 5. I took all SR4 weapons, which would happen to have an SR 5 equivalent (like the Yamaha pulsar, the Panther Assault cannon or the Ares Predator) and started comparing their values, to get some kind of guideline for conversion of SR 4 guns to SR 5.
I compiled this information into a 4 page document. I would be happy if you could take a look and tell me, if I have forgotten something.
How-to-convert-your-SR-4-guns-to-SR-5.pdf
Kind regards,
TalonZorch
Edit: Changed the link to my own hosting.