Warframe as a game is always changing and evolving. Two major examples that I have personally played through are the U22.12 weapon overhaul, and the U27.2 Warframe Revised update. Unfortunately for a sporadic content creator like myself, this means that my content is made redundant over time, and I don't have the time to update everything. As such, please take note of the version at the time of each review's latest update.
The Kuva Quartakk is an MR13 Rifle with two firing modes. Firing from the hip uses a slow-firing, relatively weak Full-Auto. When zoomed in, it retains the signature simultaneous four-shot-Burst-Fire of the original Quartakk. With several increased stats to go with its new versatility, the Kuva Quartakk is a powerful but slow Rifle.
The Quartakk is four-barreled MR10 Burst-Fire Rifle, with solid overall stats but a relatively slow RoF. It is an unusual Burst-Fire Rifle, easily distinguishing itself from the other Burst Rifles in the game, though has its own share of downsides.
