The arm, Ground pounders, made me think of Rumble and Frenzy. RIBFIR!
I wanted to add a light to the cannon/laser and found a small, flashing, blue LED at Wal-Mart. The new barrel is from RID train, weapon.
For Frenzy I used the head from the Energon crane. I changed the weapon to open from a button instead of the Cyberkey. I added yellow paint to highlight the plastic details that look like the cassette drives..
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