Forgotten Weapons just released a video on a 22 conversion for the South African Galil R4 in 5.56.

i think it would make a great conversion for US import IWI Galil to 22 LR rimfire. It would be interesting if the Black Dog Machine WASR 22/AKT-98 magazine would be compatable with this 22 conversion in a 5.56 Galil.

Granted this is a prototype but there might not be any applicable patents.