whenever i use any weapon with the unstoppable shells augment, i get terrible lag spikes
how to reproduce:
use any weapon (works most with assault riffles) with the unstoppable shells augment, usually around uneven terrain
IF they remove the weapon augments, it will be fixed!
Just wait 'til you try birdshot 
We use it on the Minigun, with no issues. At least other than the Minigun chews through ammo.