And who can do such a job like that???
You can while it's in the possession of your dealer (assuming your state allows the import, just not the sale).
Here're the ways we make 10-rounders in CA:
http://www.vaportrails.us/html/xdm.html
http://www.ebrworks.com/EBR_Works_Exclusives.html
very very good information now the issue is been avel to get the gun in my state can dawson,cc do this type of work