Hello I ran into a little issue I picked up an awesome gng m4. I ended up swapping out the internals with kwa internals. Yesterday I went to test range an accuracy with my gun. My gun is shooting hard the problem I ran into was that my m4 is not as accurate as I like. At about 50 yards away I was having a hard time hitting 3 bales of hay. (excuse my spelling) I then came to the conclusion that my barrel and inner barrel are really short. I then tried to replace my outer and internal barrel with one of my scrap guns (jg m4). I then realized that my m4 on the gng body was completely different and now I am not sure how to get my outer barrel off of the gng. So is there anyway that i can swap these barrels and get this to work?