剣付 けんつ鉄砲 てっぽうでしょう
kentsuki teppōdeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 剣付き鉄砲

1. Probably a sword-attached firearm.; Possibly a matchlock with a bayonet.

Polite
Presumptive
Conjecture