If you would like to request a promotion, simply post a thread titled "[username], requesting promotion/new MS" and fill out this form:
Username-
Current rank and suit:
What rank/suit you would like to request:
Any custom parts/weapons/etc. you would like to request, if any:

And that's it. Simple, right?
It's just to help keep track of who's got what.

Here are the list of ranks, and which suits and weapons become accessible at each rank.
Military Ranks:
Petty Officer 3rd class
EFF:
[Unit] GM
[Weapon] 100mm machine gun
[Weapon] 380mm hyper bazooka
[Weapon] Beam Spray Gun
Zeon:
[Unit] Zaku I
[Unit] Zaku II
[Weapon] 120mm zaku machine gun
[Weapon] 280mm zaku bazooka

Petty Officer 2nd class
EFF:
[Unit] GM Cannon
[Unit] GM Ground Type
[Weapon] spike shield

Zeon:
[Unit] Zaku Cannon
[Unit] Zaku II J
[Weapon] knuckle shield
[Weapon] 3-tube leg missile launcher

Petty Officer 1st class
EFF:

[Weapon] beam sniper attachment for beam spraygun

Zeon:
[Unit] Zaku II High Mobility Type
[Weapon] 360mm giant bazooka
[Weapon] 3 barrel 35mm machinegun
[Weapon] chain mine
[Weapon] heat sword
[Weapon] heat saber

Chief Petty Officer
EFF:
[Unit] GM Striker
[Unit] Gundam Ground Type
[Weapon] beam rifle

Zeon:
[Unit] Gouf
[Unit] Dom
[Weapon] 880mm raketen bazooka

Master Chief Petty Officer
Ensign
Lieutenant Junior Grade
Lieutenant
Lieutenant Commander
Commander
Captain
Rear Admiral
Vice Admiral
Admiral