Spread class weapons have a relatively slow shooting pace, low damage (per barrel) but fire in a wide spread shot. Spread guns do not have any effect on a character's speed.
“The Threedom Fighter is a spread gun obtained at the beginning of Gun Bros 2. It is free, but it...Threedom Fighter
“The Dual Spread is the first Spread-type gun available to the player. It fires in 2 directions...Dual Spread