Need help or direction how to go about converting a BushMaster Carbon 15 pistol to a shoulder fired weapon (basically adding a shoulder collapsible stock).  My question is not how to convert the weapon that’s the easy part. What do I need to do to comply with the law (BATF)? What forms to complete, money, etc. I want to do this legally. If you can help I would appreciate the information. Thanks in advance.

Coppercollarworker

ID think you could go the sbr route. Im sure someone will know.

Register the lower (serial#) as a SBR.

What HAL said.

Form 1, SBR, $200, fingerprints, CLEO, photo, the usual.  
Wait...wait...wait...wait...wait...wait...wait...
When you get the approved Form 1 back, put the stock on.    

You actually have 2 choices... one expensive, one cheap, but both involve red tape:

1) Fill out a Form 1 "Application to make and register a firearm" and pay the $200 tax stamp to make a SBR.

2) Purchase a RDIAS via a Form 4 (still pay the $200 tax) and make a machinegun.  This will cost about $10,000, but you end up with a really fun toy!

Either way is a lot of paperwork, red tape (finger prints, pictures, CLEO signature), but it is the only way to stay legal.   If you own a corporation, the corp can do the forms without the need for pictures, prints and signature of CLEO.

u can legaly make the pistol al full rifle with no paperwork, but to make it a SBR u need to do a form 1 + 200$

buy a stock and a 16" BBL.

Yes, $200 SBR

Is it  just me, or does that couch look like a big, fat ass?
I got scared scrolling down and almost didn't look at the whole picture.