Each category has several modifications available and are unlocked at different points in a characters leveling progression.
NOTE! APB Reloaded drastically changed the way upgrades work!
Field Supplier: When activated, turns you into an ammo distributor, allowing you and your group to restock your weapons. Effect: Turns you into an ammo carrier with a 5m radius.
Clotting Agent: Health begins to regenerate slightly faster, but it takes longer to fully heal.
Kevlar Implants: Health is slightly increased each level, but sprint acceleration and overal speeds can be reduced.
Happy Landings: Health and stamina damage received from falling is reduced but it takes longer to be ready to run again right after falling.
Bandolier: Allows for an extra magazine of ammo.
Heavy Barrel: Recoil compensation slightly reduces accuracy degrade per shot fired. Does not work with the OSMAW, the O-PGL79 R or the O-PGL 79 CD.
Hunting sight: Slightly increases the accuracy boost granted by marksmanship mode at the cost of increased rectile bloom when not in marksmanship mode. Does not work with the OSMAW, the O-PGL 79 R or the O-PGL 79 CD
Magzine Pull: Allows the weapon to be reloaded slightly faster than normal, reduces ammo in a clip.
Reflex Sight: Slightly better accuracy outside of marksmanship mode while reducing the effectiveness of marksmanshp mode. Does not work with the OSMAW, the O-PGL 79 R or the O-PGL 79 CD.
Improved Rifling: Grants a slightly longer effective range. Does not work with the OSMAW, the O-PGL 79 R or the O-PGL 79 CD.
Extended Magazine: Each magazine carries slightly more ammo, increases reload time. Does not work with the OSMAW.
3-Point Sling: Allows the weapon to be equipped slightly faster.
Cooling Jacket: Firing rate is slightly increased. Increases bloom/spread. Does not work with the OSMAW.
Mobile Supply Unit: Turns your vehicle into an ammo distributor, allowing you and your group to restock your weapons.
Chassis Strengthening: Slightly reduces the damage received from ramming and collisions.
Vehicle Endurance: A tougher engine that slightly increases the amount of damage your vehicle can take before it catches fire.
Explosion Delay: Fireproofing that slightly increases the delay before the fuel of a vehicle on fire explodes.
Nitro Booster: Slightly increases the vehicle's top speed and acceleration.
Extra Cargo Capacity: Slightly increases the vehicle's available cargo storage space.
Quick Repair: Slightly reduces the time required to repair the vehicle.
Steel Plating: Slightly reduces the damage caused to the vehicle by weapon fire. (currently not working properly)
Ramming Plate: Slightly increases the damage the vehicle causes in all collisions.
Blast Radius: Slightly increases the size and ferocity of the explosion when vehicle is destroyed.