I saw one done like this recently, had to take my turn at it. I got Laser Op (cab only) off ebay recently, but he was really loose and didn't come with his ab-grill. I found a PERFECT fit using the chest piece from Classics Megatron. I made the laser blaster out of a kryptonite missile launcher from a Superman Returns Lex Luthor figure. Just needed to grind off the Kryptonite. Now that's irony.