Found an OP combo
5RND Burst Trigger
Blow up barrel
Missle Munitions
And that Stock that is a barrel
Mainly so that the 5 round burst of missles are op. And the stock shooting 5 behind you. But thats useless so with the blow up barrel which makes them richoceit makes it to where it bounces from the wall behind you and launches 10 bullets at a boss. Doing a lot more damage. Got to level 300 before I lost interest, and was like damn this is too op.
Edit so no one has a seizure while reading that: Basically the bullets get shot behind you then bounce off the wall and launch forward towards the boss. shoot 10 instead of 5 at a time.