Originally Posted by ezzrider
I am new to this forum and just saw this thread. What would be illegal in doing what he suggests? Does changing out the slide make it a manufacture of a firearm? I guess the serial number on the slide would not match the serial number on the underside the receiver/grip area? The required information is on the receiver to include serial number, manufacturer and importer.
No it's not illegal. Basically it lets you use a slightly longer barrel and the high cap mags from a 21. Kinda like cutting down a full size to take the compact size magazine.