The Expendables (XO-16)

The Expendables
Requirements: Kill 25 Grunts with the XO-16 Chaingun.
Reward: 500xp
Category: XO-16

The Expendables (XO-16) is one of the many challenges in Titanfall.

How to Get The Expendables (XO-16)[ | ]

This is very easy to take care of, just use a burn card or a minimap ability to track where the grunts are.