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 Vaykor Marelok is an MR10 Semi-Auto Secondary, available from the Steel Meridian Syndicate. With an unconventional stat spread for a slow-firing weapon, it can inflict powerful Status procs quite reliably, however faces immense competition and powercreep from many newer weapons.
