2 x C4 Railguns
2 x C2 Missile Launchers
2 x Heatsick Launchers
Sneak up behind someone, unload everything -> target destroyed. Reload costs are steep though.
https://www.youtube.com/watch?v=1Io0OQ2zPS4
The Viper is a great ship and as Dead Fred pointed out, I think it is nicely balanced, giving it more range/cargo would potentially encroach on the roles of other ships - granted it would be nice to have more range and cargo but its all about the balance...
That said I do need to pry my ass out of the Vipers cockpit chair and move on to something else....
Kro