Over the years, I've seen warframes that have great emphasis on shields, health, armor, and other buffs. This got me thinking, why not also have a warframe that is all about ammunition and guns. Mesa represents one side of the gun-slinging arts. This particular warframe represents the other. Raw firepower. Bullet-hell. A warframe that can also provide significant ammo restoration for himself and his team. This emphasizes completely on the gunplay mechanics of the game for those trigger-happy players. Also, the ammo restores don't really seem to scale well with every gun that we have. And I'm strictly speaking for the bullet-hose type weapons.
So the concept I'm presenting is the warframe: Vulcan. I thought him up as an early design of warframe that seemed more practical for the Orokin to use and quickly deploy. While he is also a ninja with high mobility (In comparison to everything else that is not a warframe), ninjas have been fonder of firearms more than anything else historically. It would be amazing to have a warframe that primarily caters to using guns, machineguns. The idea is that Vulcan is a mid-armor if not low armor, onslaught that specializes in supporting a firing squad and dealing the most amount of hurt he can. However, the idea is that he is somewhat of a glass canon. This should prompt teammates to protect him as best as they can as he mows down the opposition. As a solo player, one must keep in mind to keep the frame hidden, or protected with all the arsenal available.
I imagine his general appearance would be on the heavier side with a chestplate or maybe full of mechanical holsters. One distinct feature he could have is that he has a mechanical shield that can deploy into his very own Exalted Archgun called: "Humming Bird" for it is a gatling gun that spools up fire rate until all you could hear is humming.
As for his abilities here are a few that I have in mind.
Passive Ability: "Bullet Belt" Every gun that Vulcan wields out uses the entire maximum ammo as a single clip, removing the need to reload. There could be a graphic of belts of ammunition coming out of his backpack or belts filled with bullets attaching to the gun drawn.
Ability One: "Care Package" - Vulcan essentially drops down a box of omni ammo. Fellow Tenno can interact with this box and fill their ammunition either halfway or whole. The box can be redeployed wherever Vulcan chooses too when recasting
Ability Two: Sights Lock - All friendlies' firearms gain 100% accuracy at the cast of this ability. This is indicated with laser sights suddenly appearing whenever the players aim down their sights. Bullets do not stray horizontally from wherever they are aiming even with multi-shot. However, weapons with trajectory like grenade launchers will still maintain their vertical variance.
Ability Three: Shock and Awe" - Vaulcan Unleashes a salvo of mini-missiles. Holding the ability will allow him to lock on to as many enemies as possible. More targets will mean more missiles, which would spend more of his energy.
Ability Four: "Absolution" - Much like Excalibur's Exalted blade, Vulcan can channel his Gatling Archgun. This minigun is essentially turns Vulcan into a dangerous turret. Now perhaps taking notes from Mesa or from Ivara, this can limit Vulcan's movements as he uses this ability as it is a unique and powerful Archgun.
The weapon itself is not only basing it's ammunition on his energy, but each bullet coming out of it creates a small explosion much like the Acceltra, letting Vulcan excel as overwatch for all of his teammates.
Hope you guys like the idea and tell me what you think.