These twin barrels of destruction are the signature pistols of the Kuva Guardians.
The Twin Rogga are dual Grineer pistols introduced in Update 19.0 (2016-11-11), and are the Kuva Guardian's sidearm of choice. These shotgun pistols deal heavy damage with low spread complimented by its very high status chance, but are hampered by their low magazine size and heavy damage falloff.
With Slip Magazine, Tainted Clip and Ice Storm all at max rank, a magazine of 5 can be reached. Primed Slip Magazine will not further increase magazine size, but allows Tainted Clip to be only rank 2, minimizing the reload speed penalty.
Shotguns have a unique Role here based on a very patch-work history with how they interact with Status Chance. A Shotgun that shoots 99% Status Chance would give you 35% (roughly) status per pellet. 100% Status Gives you 100% Status per pellet. This huge jump in performance happens with just a 1% gain - why? Well, to answer that we have to look at our choice to make what the UI conveys reality. It would feel broken to shoot a Shotgun with 100% Status and not see a perfect spread of Effects. In reality, to make Status consistent we have to treat Shotguns as a special case.
Shotguns as a special case means we have buffed the Status Chance of all Shotguns by x3 or greater. The UI now behaves to show the reality that you are determining Status Chance per pellet.
(Undocumented) Status chance per projectile increased from 2.2% to 6.6%.