This is easily the most effective weapon you'll come across in the game. You'll have to wait a short while before you can buy it, but it'll do you wonders of good. Take note that this is the only automatic weapon in the game, and also the only one that wasn't technically meant for mining operations. Here's a short overview of the weapon.
Location: It can be found as a schematic in chapter 3, and costs 7,000 credits from the store
Capacity: 50 pulse rounds (175 upgraded)
Primary Fire: Fires pulse rounds at a high rate of speed. They're fairly accurate, though individually not all that damaging. It'll take a bit longer to cut through enemies, but it is well made up for in how much ammo you can find for this weapon. Long or short range, this primary fire is your best shot at staying alive throughout the game.
Alt Fire: Fires a grenade at enemies that explodes on impact. Note that this will take up 25 pulse rounds each time it's fired, so it is highly suggested that you only use the alt fire on crowds of enemies or large ones such as Brutes after stasis. If you get caught up in the blast from this grenade, you will take heavy damage, so set it off at enemies at a distance.
Added by: Forgoten_Scars Mar 4th 2011, ID#7086