Quoted from Supersquid:
Actually, they do have it. You have to hit/hold the lockdown bar button to use it and it collects shots, or something like that. They said in the beginning of the steam that they were not going to be able to use it since Jack mounted a Go-Pro above it and they couldn't hit the button. Elwin actually mentioned it while he was playing saying he would have liked to be able to use it.
I think it actually was used a few times anyway. When you hit the button for the breath attack, all lit shots are immediately collected. Pretty awesome power. Like Elvira's Ray Gun but to the next level. I definitely saw the LCD pop-up confirming the collected shots a couple of times.