In light of the ban ending I orderd a new barrel A 16" M4 barrel chromelined and a FS. The original plan was to take my old barrel in my A2 upper out and put this new one in it's place. However I kinda want to build a A3 with a FF handguard. But this would cost me alot more than what I wanted to spend. Opinions? I think I'll just add a FF tube to this one and stick to the original plan.