Will this work with a PSA Complete lower? Also what are the spec of the barrel? Is this a pistol or carbine gas system? — 3 Answers

Yo, Adam West, don't scare that person, and others to death and prevent em from buying "pistol" uppers. You can ask a FFL to put on your stripped lower that it's going to be a pistol but they will look at you funny. The laws I have read, or ATF "interpretations at the time, state that an upper of less than 16" cannot be mounted to a lower that has been a CARBINE OR RIFLE. So any stripped lower, therefore one that has never BEEN any functioning weapon is, as of this writing, safe to mount a "pistol" upper on. I suppose from a 1" barrel to a 15.9" barrel. Your are correct that a "stock" is deemed illegal so just a buffer tube or " brace" has to be utilized. Some of these answers sound like an ATF person spreading confusion and misinformation. Some of the questions scare the living daylights out of me. Heard a song recently by Joe Bonnasso, ok, that's close, titled "Just Cause You Can Don't Mean You Should". Huh, maybe ATF also asking questions. At least 90% of these "questions" are just a Google away. No disrespect to you or the person asking the question here. As to has "never been a carbine or rifle" unless you commit a major crime with your AR pistol I know of no quick method to check either way. The main thing officers look for, if they even care, during traffic and you "present your legal AR pistol for their perusal, and they have some, hopefully, correct NFA knowledge, is that you have a brace and not a stock, on the weapon. The lines have been severely blurred since the first SB Tactical non adjustable for length or Blade. Now THIS is a novel. Plus all these points are moot since our AR14, Constitution hating possibly elected government is coming after all firearms. Ammo? Fuggedaboutit. "The only thing necessary for the triumph of evil is for good men to do nothing". Edmund Burke. I thank this company, and others, for doin their best to keep firearm prices from going berserk. So buy while you still can. L8r.

Hey, Yes. The previous answer is correct it will work on any PSA or mil-spec lower receiver stripped, populated or complete. HOWEVER, there is a LEGALITY issue that is a FELONY if ignored. Its ONLY legal on a lower receiver REGISTERED as an AR Pistol by an FFL. Or with an NFA Tax Stamp as a registered Short Barrel Rifle (SBR). If you put it on an FFL transferred AR-15 Rifle it is a felony. I think its possible in some states for an FFL to re-registered / re-transfer an AR-15 rifle as an AR-Pistol after a new NICS FBI check. You'd have to change the fixed/collapsible stock to a Pistol Brace that is marketed / sold as a brace. You should verify that with your local FFL first to be certain. Sorry for novel, I just don't want anyone to catch a felony over our arbitrary gun laws.