Kamen Rider Black RX would beat the **** out of all of them in even a gunfight!! :laugh: You shoot at RX, RX henshin into BioRider and liquidize, the bullet would miss. Then RX would appear behind your back as RoboRider, gun blast and you're dead!!
Either that or he'll just thrust you to death with his Riblocane.
I'd say Garren, with G3 as a close second. Unlike all these other kids with their gimmicky crossbow guns and lazer beamies and things, Garren had actual skills.
I'm going to have to go with Garren. Not sure if I'm being biased or not, but in my mind simulation of what I know of theses guys, he'd be the last gunslinger standing.