|Barrel Extension||Increases the accuracy of your shots.||Accuracy +5%||2||$15000|
|Ammo Efficiency||Reduces the amount of bullets taken per ammo missing, from the ammo box.||Ammo Taken -0.5||1||$10000|
|AP Rounds||Increases the damage of shots.||Damage +30%||3||$22500|
|Fully Loaded||Increases the amount of ammo you can carry.||Max Ammo +100||2||$12500|
|Extended Mag||Increases your magazine size.||Magazine Size +50||1||$17500|
|Fast Hands||Decreases the time taken to reload your weapon.||Reload Time -25%||1||$20000|
|Aluminium Body||Reduces the weight of the gun.||Weight -1||2||$10000|
- The M249 is one of two weapons with 7 upgrades, the other being the DMR.
- It is also one of the few weapons with more than one level of weight reduction.