No those big honking guns are not historic. As I said earlier, this boat is far from "complete" (ahould have added accurate, too
). We had to start somewhere and the only deck cannons that were available (at the time) were the 3 that the sub uses.
Along those lines, we've gotten the twin 40mm bofors converted from an AA gun to a deck gun, but it's being a little squirelly (no crew where the other deck guns had crew and CTDs when the bow gun starts firing), sooooo, more work to be done there.