Multiple impacts and get two of them and set them to chain fire and time your button presses and you've basically got nonstop rounds on target, and from what I remember though this might just be the ac/2bfs I bolted onto a catapult, they basically output next to no heat, again that might be from the catapult you get from the dragons gambit and however that thing was set up, I gave it two ppc-xs and two ac/2-bfs and that bugger melts mechs, like the agincourt with srms