This mod changes "Sydney's 10mm Ultra SMG" into "The Raptor". Although this weapon is surely powerful, it's by no way universal - DMG per single shot is only 7, and the spread of the bullets is still large enough to make it a modest choice at longer ranges. No reskinning, just a plain makeover of statistics!
(The rest of this text is written as an in-game report)

"We heavily modified this 10mm SMG. First and foremost, we rechambered it to 5mm ammunition. Yes, that's right, the same small caliber round used by the portable minigun.
The reduced diameter greatly increased magazine capacity, to be more specific, we achieved a 50% increase to a whopping 75 rounds at your disposal. And this is where the true fun begins, since we also increased the rate of fire by 50%. This gun now unleashes 15 rounds per second for a pure rock 'n roll experience. We further did a bit of rebalancing and introduced some custom-forged parts, resulting in a weapon that is easier to control and less likely to wear out. So, despite the reduced power per shot, we now have a weapon that is clearly superior to the original, more controllable, more durable, and simply deadly. This gun makes swiss cheese out of a giant RAD-scorpion. Here, try it, it's fun!"

(Item code is 6E7CC, ammo code 6B53D, if you want to try it right away)