Originally Posted By Gregory_K:
Looks to me he is looking to buy a Colt M4 barrel then have a phantom permanently attached to make it legal.
This can be done with no paper work.
You are correct.
Sorry, I may have mis-read the question
I was referring to the LE6921. Not just the barrel.
There are some 'real' M4 barrels for sale in the Equipment Exchange. That would go very well with the Phantom permanently attached - functionally and visually.