From Mundia

Aside from Caster Guns, there are two main types of firearm in Mundia - Revolvers and Rifles. The main differences between the two types are range and rate of fire; Rifles are effective as far as 8 squares away from the enemy, and can potentially be fired 4 times in one attack. Revolvers' effective range is limited to 4 squares, but with a pair of them and the Gunslinger feat one can attack 12 times in one turn.

Revolvers