Only reason I can think of that would make that possible is the U-shape in the handgaurd that rests on the barrel.
Beings the barrel is short it maybe holds it from whipping vs the extra 3.5" whipping? I knoe free float would be ideal and it is possible to remove the "u"
Why worry about it, the rifle was designed by an engineer and the U must be in there for a reason. Just leave it alone and enjoy your rifle. What would you gain? 1/4 moa at most?
I don't think I ever got an answer the last time I asked, can you get a barrel extension for these? It isn't the same as an AR extension is it? Having a new barrel made would be the best option if you want a different length and/or better accuracy.



















































