Firearm Accessed Achievement
Unlocked a Merc's Light Machine Gun
Once you have reached Rank 5 in Multiplayer, you will be rewarded with three Multiplayer tokens which are essential in unlocking loadouts and weapons. Enter the "Customize Gear" hub and unlock a Merc loadout which will cost you one token and $100,000. Now scroll down to "Alternate Weapon" where you can find two different LMG's available to purchase for the achievement. Each LMG will cost $120,000.