Piranacon came with:
2 black fists, left and right (Snap Trap)
1 turquoise head (Snap Trap)
1 turquoise chest shield/turtle shell (Snap Trap)
2 magenta feet (Snap Trap)
1 pink sword/trident (Snap Trap)
1 black rifle (Snap Trap)
2 blue guns (Tentakil)
2 blue guns (Skalor)
2 magenta arms (Overbite)
1 purple gun (Overbite)
1 grey gun (Nautilator)
2 grey claws (Nautilator)
2 black guns (Seawing)
6 black 3-piece figure stands

Piranacon was a robot formed out of the Seacons, released in 1988. The Seacons were released as a gift set also, which did not include Nautilator. Every Seacon except for Snap Trap can transform into a weapon.

Be careful of the many bootlegs that have shiny, low quality plastic parts and "white-backed" stickers.