the M-340L PGWS (Portable Gatling Weapon System) it's the dream of all the maniacs of overkill this weapon might fire the tiny 5.7x28mm ss190 round but the shocking fire rate of 1200+ (RPM can be set from 1000 to 1850 RPM) it's able to literally "chew" the target

Caliber: 5.7x28mm ss190 (avabile also in 4.7x30mm)
RPM: from 1000 to 1850
Mag.: Electical fed container with 8000 rounds