Board Thread:Complaints and Suggestions/@comment-25547368-20141213004639/@comment-16087280-20141213011126

If u don't have XM8 Limited Edition, u can't do it. Basically, changing the barrel means changing XM8 Carbine into the limited version (changing A mode into B mode). U can do so by press the key 1, then choose ur weapon. See XM8 Carbine page for details, XM8 Sharpshooter (LE) page also. Remember, u don't have XM8 LE then cannot do so.