Modern Warfare 3 is full of different weapon challenges for camos and weekly tasks, which include earning Barbones Kills at some point. If you want to quickly earn some new rewards, this guide will go over exactly what this challenge entails. MW3
COD MW3: How to Get Barebones Kills
You must eliminate enemy players with a weapon that has no attachments to earn a Barebones Kills in Modern Warfare 3. As the name suggests, your weapon has to be completely bare for the challenge to start tracking eliminations. This can be done on any gun, so picking a weapon that is fantastic by default can be a significant advantage. I recommend using a gun like the MCW if you want to quickly get past the challenge.