Originally Posted by digital_blue
Metal slides and barrels are supposedly still legal to import. Don't take my word for it though. I've had over $500 in metal slides and mags seized before. Unfortunately, there are no easy ways to reproduce GBB frames that could bypass the replica definition...
Yeah, I hear about slides being seized at times, yet others, that have been opened and inspected by customs, make it through. I just had a metal slide for my P226 make it through customs, even though it was with them for 3 days. I'll see later today when I pick it up if it was opened or not.
But yeah, manufacturing lower frames for pistols would definitely be a no-no.