RAS, yes, exactly. They are built with NEW receivers AS pistols from day one, so it is legal to build something like this. If all we had were M1icon carbine rifles, could not be done without going the NFA route.

The pistols of the 70's had various barrel retention designs, but pretty much, none of them used the typical G.I. barrel band. The newer Inland company is now making a pistol version they call the "Advisor", based on pistol as illustrated from the Viet Nam era images.

I have a Fulton Armory carbine receiver that came to me as only a receiver, so it is also legal to build into a pistol, short barrel, chopped stock and all. I was on my way to finishing that one when an Advisor presented itself for about half their listed retail. Much better buy at well under 1k. I really wonder how they sell at nearly $1,300.00 retail?? Too much in my opinion.