Tommy had less personal issues with killing as a matter of course. He'd done more than enough of it, and needs must, after all. It was more about the repercussions of the action coming back to reflect on the boys in the gang, Best to avoid the worst damages where you could, particularly with Charlie in the picture, who'd been threatened more than once, but, well...
"I wouldn't mind a secret weapon." he grinned, his face a little feral at the idea.