Hmmm...I'm thinking the budget way to do this would be to assemble the stripped lower into a *.22* caliber handgun first. No buffer tube required; for that matter, no front handguard required. All it takes is an LPK, 22 conversion, a plug for the buffer tube hole, and a shot out  old upper. Pull the gas tube and FSB, cut the upper off at pistol length, and voila! Low budget temporary pistol build. Photograph, shoot, save target, sell shortened upper and then assemble into rifle. Keep keep the bill of sale for the shortened upper so there are no SBR questions later about "constructive intent".

Now, where did I put those CMMG "election special" lowers I bought...

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For the gent asking about the folding stock - yes.  If you have short arms it might not be worth it.  I'm 6'2" and have long arms.  When I added a folding mechanism to the ar/m4 stock it felt long.  So I went back to the telescoping stock, with it collapsed its a pretty compact carbine.

I just dragged this one out to the range and burned through a bunch of 10mm to see how it runs.  



Mech Techs ain't ugly any more.  

First range report was good too.  No failures at all over 200 rounds mixed, and solid carbine accuracy.  Gonna have to put a reflex sight on it, but I'll get to that later.

Hello
 I ran across this thread while doing a search for an issue I'm having with Mech- Tech.
I own an older .45 1911 CCU that I've used in 3 gun and Steel Challenge matches. It's never given me any problems with any reload I've used in it. From major power loads for IPSC to light bullseye loads for Steel Challenge matches.
My wife owned a Glock 17 CCU until it was recently lost/stolen when shipped to our house.
   This is a little fyi if ever you need to send in your unit to Mech-Tech.
I sent the G17 back to Mech -Tech for the second time to repair a broken extractor pin.
After waiting a while I called them to ask the status of my CCU. I was told that it had been shipped and delivered to my house a week before, on a day we were out. I told them it wasn't here, and that I hadn't been notified that it was being shipped. So I called Fed-X to see if it had been delivered to the wrong address. They told me that it was left at my front door because the shipper hadn't requested a signature upon delivery. They also told me that Mech-Tech hadn't taken out any insurance so Fed-x wasn't libel.

I called Mech-Tech back to see what they were going to do for me. The answer was "nothing". They said they shipped and it was delivered and that's it. That they don't ever take out insurance or request a signature unless the customer wants to pay for it.
I explained that on the two occasions that I sent the CCU  to them, I had taken out insurance and requested a signature from them,. I told them that no one had notified me that the unit was going to be shipped back to me. Had they done that, I would have paid for the insurance and a required signature upon delivery.
So now I'm out a Glock17 CCU and some thief has it and who knows what it'll be used for or where it is.
If Mech-Tech had simply required a signature, Fed-X wouldn't have left it at the door.

So my advise would be that if Mech-Tech is going to ship something to you, be sure to insure it and request a signature. I've never had anything like this happen to me before

So in the eyes of the ATF if you have a Mech Tech upper and you own a 1911 pistol you are  breaking the law.How do they know you never put the Mech tech upper on your 1911 lower?
It seems to me just by owning both one would be in violation of the law, unless you owned a second 1911 lower.

So in the eyes of the ATF if you have a Mech Tech upper and you own a 1911 pistol you are  breaking the law.How do they know you never put the Mech tech upper on your 1911 lower?
It seems to me just by owning both one would be in violation of the law, unless you owned a second 1911 lower.

I kind of want to sbr one

I know you were looking at the MT 1911 CCU, but combat armory has complete used G3 lowers for $99 and free shipping. I bought one for my .40 MT. They appear to be virtually brand new, mechanically. I wasn't worried about legality, but for $99, why switch it out?

http://www.combatarmory.com/pre-owned-complete-glock-22-gen-3-lower/

So then this would also apply to a 16” CAA Gear Roni Carbine Conversion?

Another case of F^#% the ATF. If our government has such time as to investigate such owners of otherwise legal firearms then go do something useful.

What?!

When did this ruling happen?!  Last I checked, going from pistol to long gun & back was legal... goes back to the TC Contender if I recall...

It is, and that's what the big news (back in the day) was with the following PDF.

https://www.atf.gov/firearms/docs/ruling/2011-4-pistols-configured-rifles-rifles-configured-pistols/download

To clarify: using a Mech Tech CCU to turn a pistol frame into a carbine, and going back to a pistol as desired, is perfectly legal.

Mech-Tech Carbine Upper for 1911 Pistols Firearms News tests the powerful .460 Rowland Model, which also shoots .45 ACP! Self defense and hunting for 1911-­Packing Survivalists! (full article)