Figure: DC Cyborg
Grenades: Marauder
Claw: Apocalypse BAF
Cannon: spring-loaded launcher

B.A.T.s, Battle Android Troopers, the expendable backbone of Cobra. Released onto the Battlefield when it is thought that the battle is lost. They will eliminate any and all, friend or foe, without reservation.

SuperB.A.T.s do that and more. Using nano-technology they are capable of transforming their arms into a wide variety of weapons.
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I've made three of these so far. They are just fun to make.