Proposition

The Proposition is an LMG developed by Smoke Stack industries. It is currently the second heaviest weapon in the game, with -60% movement modification, making it most effective being used by a Heavy with a suitable number of skill points in the Heavy Gear category. However, it deals the highest damage out of all LMGs, beating the Ronson LBM by 50 damage and over double the fire rate. Recommended augments would be the usual, overclocked, deadly, capacity, and skeletonized/race modded, depending on your preference, or Skeletonized to reduce the weapon's massive movement penalty. Consider Adaptive if this is your main Nightmare Mode weapon, as it will make it nearly unstoppable, however it is rather unnecessary outside of it.

All this power comes at a high price; the -60% movement penalty puts most players off, and only those with several points in Fast Movement, Heavy Gear, or speed increasing armor (such as Titan MEM Sprint or Shotlite armor pieces) are able to use it with even some resemblance of mobility. As such, it is bad when fighting faster bosses such as Devastators, who will constantly chase the player at a decent speed. Always bring a weapon with a low movement penalty if you think you will be facing these. It's slow reload speed can be crippling, and may even result in death should you have to reload at a crucial moment. It is a better idea to reload when there are little to no zombies around or to just switch to another weapon. Even though it has high damage per shot, a player will still have to buy lots of ammo, especially in Nightmare Mode, to feed the Proposition's voracious ammo consumption. Field Supplies can help but alone is not enough to sustain the weapon.

Depending on your build, it can be a huge asset or a massively useless disadvantage. Those capable of wielding the Proposition should have little trouble and much satisfaction tearing into horde after horde of zombies, and cutting down bosses like paper mache.

Trivia

 * This weapon appears to be a hand-held version of the real-life Gatling Gun, although it isn't as the top-view and description imply that it only has 3 vertically stacked barrels rather than 6 or more rotating barrels.