If you manage to complete the requirement below and stump up the cash, then you can unlock the signature weapons below. They are all rated five stars!

AMR - Sniper Rifle
A customized Z93 with extended magazine, high power scope, and custom paint. Fires an explosive, penetrating round. Enhanced for damage at long range.
How to unlock: Find 20 Relics.
Cost: $4,800

Bull Shotgun
A customized M133 shotgun with extended shell capacity, and custom paint. Enhanced for damage.
How to unlock: Find 10 Relics.
Cost: $3,010

Bushman Assault Rifle
A customized P416 with optical scope, extended magazine, suppressor, and custom paint. Enhanced for accuracy and damage.
How to unlock: Activate all Radio Towers.
Cost: Unknown

Cannon Pistol
A customized .44 Magnum with extended barrel, optical sight, 6 round chamber, and custom paint. Enhanced for accuracy and damage.
How to unlock: Uplay Reward
Cost: Unknown

Japanese Tanto Machete upgrade
The tanto is a Japanese dagger that was carried by the samurai. Wielding one of these will increase the damage dealt in melee combat.
How to unlock: Find six Letters Of The Lost.
Cost: $0

Ripper Light Machine Gun
Description: A customized MKG with optical scope, extended magazine, and custom paint. Enhanced for accuracy, damage, and low recoil.
How to unlock: Successfully complete six Trials Of Rakyat.
Cost: $4,200

Shadow Pistol
Description: A customized 1911 pistol with a larger magazine, silencer, and custom paint. Enhanced for accuracy and stealth.
How to unlock: Liberate 17 enemy outposts.
Cost: $2,600

Shredder Submachine Gun
Description: A customized Vector .45 ACP with reflect sight, suppressor, extended magazine, and custom paint. Enhanced for accuracy and damage.
How to unlock: Collect 10 Memory Cards.
Cost: $3,275