If I have the converted non restricted version now, do I need the parts or can the 11” barrel be dropped in?
Your 11" barrel had it's gas block, gas regulator/parts, and trunnion robbed to make the 18.6" barrel work. Making it a completely stripped down barrel that cannot be simply dropped in.
That's the whole point of this thread, gauging interest for acquiring more of those parts that were robbed.