Tiaral

Sniper Arquebus
Longer reload time, greater range.

So, without the Gunsmith perk, the reload time is 2? How much greater is the range?

Heavy Arquebus
Shorter range, greater damage.

Reload time of 1?

Hand Cannon
Ability to move and shoot simultaneously, shorter range.

Again, I would like to see this range assessed in a table.

Portable Cannon
Longer reload time, movement speed restriction, area-of-effect damage 3x3.

Reload time of 2? If allies are standing on one of the cells in the shot, do they take damage?

Tanegashima
Improved arquebus.

Well, it seems this item is simply unavailable to me.