Snipers in r2da dominate in most aspects except for close range maps and bosses other than that the snipers can be used and will dominate they have the highest range the second highest accuracy and do the most damage per shot out of any bullet type gun.
Shotguns get the lower end of the stick with many of them having low ammo count and high spread with the exception of the spas. there should be a high rank shotgun with higher range and accuracy or we could see a automatic shotgun.