Reach the indicated level to unlock the corresponding weapon.

Rifleman class
Level 1 (Recruit): Assault Rifle - Coalition: M16A4, Opposing Force: AK-47
Level 2 (Regular): Extra Magazine
Level 3 (Expert): Red Dot Scope
Level 4 (Veteran): Light Machine Gun - Coalition: M249 (Mk.46 Mod 0), Opposing Force: Kalashnikov PKM
Level 5 (Operator): Suppressors
Level 6 (Commander): Open-Tip Ammunition
Level 7 (Elite): Long Range Combat Scope
Level 8 (Tier 1 Recruit): Muzzle Brake
Level 9 (Tier 1 Regular): F2000 Assault Rifle
Level 10 (Tier 1 Expert): Veteran Assault Rifle
Level 11 (Tier 1 Veteran): Veteran Light Machine Gun
Level 12 (Tier 1 Operator): Enemy Assault Rifle
Level 13 (Tier 1 Commander): Pistol Ammo
Level 14 (Tier 1 Elite): Enemy Light Machine Gun
Level 15 (Tier 1 Warfighter): Extra Grenade

Sniper
Level 1 (Recruit): Battle Rifle - Coalition: M21, Opposing Force: Norinco NDM-86 (SVD)
Level 2 (Regular): Extra Magazine
Level 3 (Expert): Long Range Combat Scope
Level 4 (Veteran): Bolt-Action Sniper Rifles - Coalition: M24, Opposing Force: Izhmash SV-98
Level 5 (Operator): Laser Rangefinder
Level 6 (Commander): Open-Tip Ammunition
Level 7 (Elite): High Power Scopes
Level 8 (Tier 1 Recruit): Suppressors
Level 9 (Tier 1 Regular): G3 Battle Rifle
Level 10 (Tier 1 Expert): Veteran Battle Rifle
Level 11 (Tier 1 Veteran): Veteran Sniper Rifle
Level 12 (Tier 1 Operator): Enemy Battle Rifles
Level 13 (Tier 1 Commander): Pistol Ammo
Level 14 (Tier 1 Elite): Enemy Sniper Rifle
Level 15 (Tier 1 Warfighter): Extra Grenade

Special Ops class
Level 1 (Recruit): Carbine - Coalition: Colt M4A1, Opposing Force: Kalashnikov AKS-74U
Level 2 (Regular): Extra Magazine
Level 3 (Expert): Red Dot Scope
Level 4 (Veteran): Combat Shotgun - Coalition: Remington 870 MCS, Opposing Force: Tula Arms TOZ-194
Level 5 (Operator): Suppressors
Level 6 (Commander): Slugs/Open-Tip Ammunition
Level 7 (Elite): Long Range Combat Scopes
Level 8 (Tier 1 Recruit): Laser Sights
Level 9 (Tier 1 Regular): P90 PDW
Level 10 (Tier 1 Expert): Veteran Carbines
Level 11 (Tier 1 Veteran): Veteran Combat Shotguns
Level 12 (Tier 1 Operator): Enemy Carbine
Level 13 (Tier 1 Commander): Pistol Ammo
Level 14 (Tier 1 Elite): Enemy Combat Shotgun
Level 15 (Tier 1 Warfighter): Extra Grenade