User blog comment:JoeRamirez/Call of Duty Modern Warfare 3 Weapons Wishlist./@comment-71.139.19.3-20110602003813/@comment-3545712-20110612213706

XM8 lost, it is gone. They don't produce it anymore. plus, in 2016 it would be the M8 likely, if were still in production. The 'X' signifies it being a prototype. Such as the XM177E2.