You can convert a MAK-90 (legal semiauto version of the AK-47) to full auto. It’s not as if it’s rocket science.
http://www.angelfire.com/anime5/unclero/books/AK47_Full_Auto_Conversion_for_Dummies.pdf
OMG! Thats on the interweb? Shh dont tell the libs. Yeah, i”m aware.