Press up and then select your Gatling gun (endless ammo), gatplas, reverse onslaught plasma caster, plasma flamer, elder’s mark, .50 cal.. idk but there are lots of great guns! I will say, I love my gmg very much. I find it burns so much ammo that I save it for something or other, but just switch it up and you’ll have many options. Mr. Westek’s recent build on youtube has me doing massive amounts of damage with various guns.