Rekkyou Sensen - Vol. 8 Ch. 30 - Details

[MangaDex]

 

[NicoBrown]

Go! Go! Tho!

 

[kinkoku]

A gun-hammer-wrench-baton-infused weapon? Hell yeah

 

[phil777]

A gun-hammer-wrench-baton-infused weapon? Hell yeah

It looks like a Tonfa. At least 2 characters in the Legend of Heroes, Trails, use one. And one of them is a girl whose tonfas can also shoot. https://kiseki.fandom.com/wiki/Juna_Crawford