Into the underside? Hm. Yeah. I could see how that could work as a backup for you. Alongside your Quirk.

[Izuku may be going into his bubble again. Where he strategizes and considers possibilities. The potential. How it might work. He's got no real reference in how this automail works exactly, but the idea of a prosthetic with a gun likely would complement Bakugo's existing abilities and all.]

Ah! That's right. The powers from the different seasons, isn't it? There was stuff about that in those pamphlets we were given.