IANAL but even if its pre 13 receiver, it can't transfer to you unless its an inheritance
AK Pistol to AK SBR is the only known path I believe.
Plus people may be less willing to help nowadays due to the ATF guidance preventing non-FFL's from performing gunsmithing for others. It pretty much ended build parties.
You can not build any banned rifle or pistol. Those are two different lists however. AK rifles are banned. AK pistols/SBRs are not. Uzi and MP5K are banned assault pistols however. It doesn't make sense so don't try to figure out why. The laws are a mess so just research carefully. FAL is on the banned rifle list. Don't know where the PSL falls.
Posted from a different thread: "according to the ATF it is legal to build an unserialized firearm at home for personal use, you just cant sell it or give it to anyone. Marylanders build firearms from from an 80% receivers all day long and never serialize them, so that got me thinking. How would anyone know the build date of a home made firearm from an 80% blank regardless of the type of firearm, banned or not? As far as I can tell the MD Firearms Safety Act of 2013 prohibits: "transporting, possessing, selling, offering for sale, transferring, purchasing, or receiving any assault weapon" It does not say "prohibits the manufacture" of any assault weapon (which by federal law I believe you can do).
In addition the 2013 firearms safety act allows a person who lawfully possessed, has a purchase order for, or completed an application to purchase an assault long gun or a copycat weapon before October 1, 2013, to continue to possess and transport the assault long gun or copycat weapon. So, that has me scratching my head... The federal laws of building a firearm at home are clear, and since a home-build firearm does not need to be registered how would anyone know if that firearm was build prior to 10/01/2013?"
They wouldn’t. It would still, however, be illegal and it’s not the smartest thing to post it here.