I don't think a rattle gun would be any good with the drill end ,7000 rpm is a little fast and the impact action
would probably break drill bits Mf. The air ratchet works good as a drill though ,it's handy getting into tight spots
like under car dashes etc.
People ask me sometimes if they can use their rattle gun to start their mower ,the answer is always no.
Cheers
Max.