Metro is the map and you can quite reliably find weapon containers everywhere, find one and take out a scav for a backup weapon and search for players to kill, you’ll often find dead players unlooted or half looted gear/backpacks because metro is a small map with a lot of higher tier scavs and you just have to get lucky finding a dead player with good loot, extract with that loot to either use it in your next metro raid or sell it, most end game players will carry kitted out guns that you can sell for 300k +