Scurry towards the grenade launcher's location and follow the on-screen prompt to equip it. The next area will allow you to pick up a new weapon - The M-100 Grenade Launcher - to use on a crew of nearby robots that will eventually emerge out of the door. The good news is that, once all is quiet, you can find ammunition dropped by all of those enemies you killed. Take cover and make sure to remain consistent in shooting these foes as they approach, since you can find yourself inundated and in serious trouble if they start to swarm your position. Thankfully, these foes aren't fast-moving or aggressive, nor can they aim exceptionally well, so you'll have plenty of time to deal with each one as they approach you. In the following room, you'll again find yourself under attack, this time from seven or eight LOKI Mechs instead of just one. You should be able to replenish your ammunition here via some Thermal Clips, as some should be strewn around on the floor. Mech down, head up the stairs it was one and through the door it emerged out of.
