I train in Kali and like fast knives.
I'm guessing that the RC-3 is going to be about as nimble as they get, seeing as how the others are thicker (correct me if I'm wrong). The RC-3 balances well, and fits my hand perfectly. I was hoping that the others, while bigger and thicker, might have a similar feel.
I bought the Izula and RC-3, thinking that I would carry the Izula and use the RC-3 for bushcraft. It turned out to be the opposite. I carry the RC-3 and the Izula does backup duty in my 72 hour bag that I keep in the car. It's just too small and doesn't fit my hand. I was thinking that maybe I was wrong about the size of their other knives, but it seems that I was correct.
My issue with most "fighting knives" is that they're too light, and most are worthless for bushcraft. My problem with most "bushcraft knives" is that they're too heavy, and most seem ill suited to fighting. I was hoping to find some compromise, a knife that could do a decent job of both. It seems more and more like that won't happen, so...
If you had to use a RAT knife for fighting, which would you use and why?