Oh that's an easy one to answer brother. Dog Brothers Kali Tudo/Stick grappling training is by far the best for stick/knife/gun training. I'm putting myself out there by saying it too since there are many other great ones. Marc "Crafty Dog" Denny is basically the Eddie Bravo or Marcelo Garcia of weapons training. I'd train this, but absolutely 0 of my buddies who train martial arts are interested in a combat weapons training system. Ironically, I know a bunch of kids who like that XMA *dancing with weapons to music* type training.
http://www.youtube.com/watch?v=nTKqYkvmdkU