User blog comment:Sentry 616/Weapon Gushing/@comment-27144409-20190815004838

So you've got a nice .50 cal. Now what are you going to load it with? Well unless you're using the M85 (which I recall being incompatable, but don't quote me, pretty sure there is a .50 cal that won't accept this), there is a clear winner for all around lethality.

The MK 211 Raufoss. Combining aspects from explosive, incendiary, and armor piercing rounds, this is a 20mm punch in a .50 cal package. It is highly effective when you already need to make each shot count, say with an M82, but you can still load an M2 with a belt of these.