回転かいてん弾倉だんそうしき拳銃けんじゅうでしょう
kaitenda n sō shikikenjūdeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 回転弾倉式拳銃

1. Revolver, likely.

Polite
Presumptive
Conjecture