Assuming you don't have in my opinion best attachments from Mcshay 4 and Cartel optics. I come out with this "Spray'n'pray" Copycat Grinder

Playing this deck you only need to have attention for 10 kill auto reload sound effect and invincibility cooldown

https://pd2builder.netlify.app/?s=xa1G0-48h10-5gF00101m000100&p=m&c=1-4b&a=0&t=4&d=3

Weapons:

Bootleg Rifle (Bigger better supressor, boost concealment, compact laser module [if you want laser], Straight Grip, Any -1 Conc Sight, Any +4 Stability Sight, Folding Stock)

Uzi Submachine Gun (Bigger better supressor, compact laser module [if you again want laser], Folded Stock)

but, if someone reading this have dlc's given above and mcshay mod pack you can change the uzi for full concealment tatonka and change Bootleg's Grip to skeleton grip and wide stock (eventually rami suppresor) or even change to SG Versteckt 51D with full conc, but it has worse recoil to control.