Watch those gutters. This looks like two pages. So don't allign the gutters so evenly. Try to lay them like bricks. Off just a little so the eye knows where to go.
Also, try to mix up the shots a bit more. You have two pull back shots- creating a jump cut. Two zoom in shots that aren't zoomed in from the previous panel. And three more wide shots.
The second panel, I don't like the samurai being on the left. The first panel, he's on the left, the close up shot of him appears that he's on the left facing right. I really can't tell what's going on in the fifth panel. The sixth, I think you should show the hand holding the gun.
On a side note, the first panel doesn't show his eye patch. And the next few panels he does. It kind of adds to the jumpcut in the first two panels.
Also, that dismembered arm looks too stiff and un-natural.
So remember to mix up your shot zooms, but don't go crazy with different angles. Watch your panel to panel transitions.