Shoota

An Ork's shoota is chosen due to the amount of noise it makes and the amount of damage it can do. The best shootas are deafening and deadly in equal measure. Like the slugga, shootas are not very accurate, which suits the Orks just fine since they seem less interested in accuracy as they are with causing damage and raising a raucus. None the less, mobs of Shoota Boyz make up for their lack of accuracy with sheer volume of fire directed at their targets.

Shoota
A shoota is the Ork equivalent to the Space Marine Bolter. Essentially a machine gun (most even look like early WWI machine guns), the shoota is the weapon any ork looks at getting when he wants "more dakka". Mobs of Slugga Boyz will often have a few boyz armed with shootas to add a little extra sting during the shooting phase, but entire mobs of Shoota Boyz are also common; footslogging across the board sending torrents of bullets at any enemy in range. An ork mob may trade in their sluggas and choppas for a shoota at no extra points cost.

Big Shoota
A big shoota is a loud, heavy, large-calibre machine gun that bucks and sparks like crazy when the trigger is pulled. Quite simply a larger caliber shoota, the only real advantage to using it is added range. A big shoota has twice the range of a regular shoota. Big shootas are also less prevelant on the battlefield, since there can only be one ork armed with a big shoota for every 10 orks in the mob; so a mob can have up to 3 big shootas at its max mob size of 30 models.