Rewards:
As soon as you complete Razing the Steaks, talk to Zip again to start this mission. You have to head to Catamount Mines. Once you’re in location, scout the area for targets. You have to rig four gold crates with explosives and to do that easily, you’ll have to take out the guards silently. It’s easier to start off from the rocky outcrop west of the mine so you can have a good vantage point for tagging targets and easier time getting inside without getting seen.
Make sure to clean out the place of enemies before rigging the fourth crate because as soon as all explosives are armed, enemies will start flooding the place again in order to disarm the explosives. Before that happens, it will be better if you can place proximity explosives near the crates to kill any enemy attempting to disarm them. It will also help if you’ll order your squadmates to guard key positions near the crates to protect the explosives or serve as a distraction as you eliminate the enemies yourself.
When ready, rig the 4th explosive and prepare to defend it until the timer expires. If an enemy manages to disarm an explosive, you’ll have to go there and reactivate them again. There will be an enemy chopper that will attempt to rain down hot lead from the broken roof. Make sure to take it out immediately using a rocket launcher or your own LMG.
Once the bombs are armed, leave the compound and get to a safe distance. There will be more peggy stragglers outside so deal with them as well until you’re in the clear. Mission complete.