The Helldivers smash their latest MO and for some reason have taken against anti-tank mines, but 'can finally go back to killing bugs in good conscience'

pcgamer.com:

Helldivers 2 may have slowed the pace of updates after a breakneck launch period, but that hasn't meant a pause in the ongoing galactic war and the major orders that herd these overarmed cats around their target planets. The latest focused on liberating X-45, apparently home to a mysterious «interplanetary battle station», with over half the player base at any given time pouring in there to give the Automatons a bullet buffet—and we did it.

I'm not claiming that my own heroics tipped the balance, though like everyone else I'll happily take the loot. But this has turned out to be a slightly odd one inasmuch as the main reward is now pending. For the time being, we've got a side reward that's basically the rocket launcher from Commando, and all anyone's talking about is the reward they don't want (anti-tank mines) that we didn't get anyway. 

So the interplanetary battle station's «plans» have been saved, and «work completing this research will commence shortly.» The speculation I find most plausible is that this relates to some kind of incoming clan system, which would both be a great addition (imagine being able to build up squad bonuses over time) and suggest that the intergalactic doodoo is about to hit the fan. 

The actual concrete reward for this MO, confusingly enough, manifested halfway through the mission (and it was leaked a month ago in a PlayStation marketing email).  The game's lore has it that X-45 hosted an Advanced Weapons Lab left-over from the first Galactic War, which is what went down in the original 2D Helldivers, and during this MO a cache of MLS-4X Commando missile launchers was discovered. Yes it's basically the quad rocket launcher from the Arnie classic, and yes it explodes things good.

This weapon's an alternate to the EAT-17, aka the expendable anti-tank launcher, which does tremendous patriotic damage but only gives you two shots. The Commando does slightly less damage but with four bites of the cherry, which to my mind makes it preferable