I messed up my build but here's the better version of it
quad barrel bouncies ato trigger amoe can sticky stock and stay grip but u will need to find a bow trigger and swap out your trigger for a bow one and charge the bow trigger then with out shooting u must switch back to your preveise trigger u will get more damage and bullet speed if u do it and the charged arow icon will apre if done right
plus do not use the smg barrle ore mini gat it ruins it it take 1 minte to 2 mins per boss