Show wise he just uses the flamethrower, which can also fire missiles of some kind from time to time. Toy wise, it was always a little tough to tell with the Beast Wars toys because everything was integrated in both modes, but strictly speaking his weapon assembly consists of the gray gun piece, the outer mandible piece (which according to the instructions, could also be used as a hand to hand weapon-it's a got a peg to on his robot arm, just like the gun), the antenae that attach to the mandible piece, and two missles which also double as his back legs (and they're the same on both sides).

http://www.tfu.info/1996/Predacon/Inferno/inferno.htm (http://www.tfu.info/1996/Predacon/Inferno/inferno.htm)