I recommend installing this mod: https://modworkshop.net/mydownloads.php?action=view_down&did=1497
So you can just hold down m1 instead of spamming the E button repeatedly.

Basically,

Insane ROF
Low Dmg

Now you can have fun slaughtering cops with this beast.

Tho you might get accused for cheating since your swinging your melee weapon at a godly rate.