This article contains speculation, information which has not been confirmed by a reliable source. The game is still in development, and all information is subject to change.
Weaponry in Firefall are split into 2 main categories: Primary and Secondary. Primary Weapons can only be used by the specific type of Battleframe it is assigned to, including Advanced Battleframes from that archetype(e.g. Rhino using Dreadnought's HMG) , if available, and are limited on ammunition. Secondary Weapons, on the other hand, can be used with any Battleframe and have infinite ammo. Red 5 Studios currently seems to be working on expanding the number of secondary weapons in the game(needs confirmation) ..
Plasma Cannon - Assault Frame Primary Weapon
Assault Rifle - Assault Frame Secondary Weapon.
Healing Gun - Medic Frame Primary Weapon
Assault Rifle - Medic Frame Secondary Weapon
Sniper Rifle - Recon Frame Primary Weapon
Sub-Machine Gun - Recon Frame Secondary Weapon
Repair Gun - Engineer Frame Primary Weapon
Assault Rifle - Engineer Frame Secondary Weapon
Shotgun - Engineer Frame Secondary Weapon (Unlocked Tier 1)
Heavy Machine Gun- Dreadnaught Frame Primary Weapon
Assault Rifle - Dreadnaught Frame Secondary Weapon
Thermal Cannon - Firecat primary weapon.
Fusion Cannon - Tigerclaw primary weapon
Assault Rifle - Medium range automatic rifle.
Sub Machine Gun (SMG)- Short range submachine gun.
Shotgun - Close quarters semi-automatic rifle.
Grenade Launcher - Revolving chamber grenade launcher.