I get the feeling like someone slipped up and added an extra 0 to make it 5,000 score required, because that's excessively grindy. 500 resupplies at 10 points apiece is a little much. Or they're trying to force people to play Squad Conquest as the only fast alternative to this grind, because, IMO, melee kills in this game are way too few and far between. Been trying for 3 matches and haven't gotten a single one, because it's just not reliable enough and guns kill way too quickly for me to get the proper drop on someone. Going through my profile page it says I've only gotten 27 melee kills in 104 hours. That's about 1 melee kill every ~4 hours. So this single challenge should only take me 24 hours to complete lol.
Anyway, is the Panzerbuchse 39 even worth it? I hate the Boys, and only used it to level 4.