He probably uses seastone bullets.
Maybe he has faster bullets or the bullets are capable of honing in on its target.
The gun may have a trick to it, like if someone hears the gun, they get trapped in some illusion (yes something like genjutsu).
The gun might have a DF.
As others suggested, might be a CoO master. Possibly be able to predict an opponents movements so well, he knows where to shoot before they get there.
Gotta remember how creative Oda is. Seems weird on the outside looking in but just wait, Benn is probably more OP than we know. We haven't many feats of any of a Yonkou's mates really besides WB's and kinda Teach.
Maybe he has faster bullets or the bullets are capable of honing in on its target.
The gun may have a trick to it, like if someone hears the gun, they get trapped in some illusion (yes something like genjutsu).
The gun might have a DF.
As others suggested, might be a CoO master. Possibly be able to predict an opponents movements so well, he knows where to shoot before they get there.
Gotta remember how creative Oda is. Seems weird on the outside looking in but just wait, Benn is probably more OP than we know. We haven't many feats of any of a Yonkou's mates really besides WB's and kinda Teach.