Secondary Weapons include handguns, Machine pistols, and Launchers. Lots of high mobility weapons with some heavy vehicle piercing launchers.
Pistols
USP .45
Semi-automatic (single fire).
Unlocked: Default
P99
Semi-automatic (single fire).
Unlocked: Level 10
MP412
Revolver.
Unlocked: Level 30
.44 Magnum
Revolver.
Unlocked: Level 46
Five Seven
Semi-automatic (single fire).
Unlocked: Level 58
Desert Eagle
Semi-automatic (single fire).
Unlocked: Level 76
Machine Pistols
FMG9
Fully automatic, close range.
Unlocked: Default
MP9
Fully automatic, close range.
Unlocked: Level 16
Skorpion
Fully automatic, close range.
Unlocked: Level 36
G18
Fully automatic, close range.
Unlocked: Level 70
Launchers
SMAW
Free fire or vehicle lock-on.
Unlocked: Default
Javelin
Location and vehicle lock-on.
Unlocked: Level 24
Stinger
Vehicle lock-on only.
Unlocked: Level 40
XM25
Airburst 20mm Grenade Launcher.
Unlocked: Level 52
M320 GLM
Grenade Launcher.
Unlocked: Level 64
RPG-7
Fires unguided rockets.
Unlocked: Level 80