Stupid ar pistol legal question....

[Great-Kazoo]

thanks--ok, next stupid question--is there a difference in a "pistol" upper? or do you just buy the barrel length you want, chuck it on the lower, and as long as you don't have a stock, you've got the AR pistol?

ANYTHING less than a 16" barrel is considered a NFA / SBR or Pistol Upper. DEPENDING what your plans are. I have X SBR's and X pistol lowers (already set up as) How many uppers and what barrel length i have is irrelevant. As anyone, outside a Vague legal interpretation would agree.

AS for "chucking it on the lower" ONLY if you purchased the lower as OTHER or PISTOL.