Tortort micro galil receiver, micro galil parts kit, Magal stock, m1 carbine mags, and get a barrel blank and turn and chamber my own custom barrel.
From what i can tell the Magal stock retains the mags, and otherwise it is pretty much just a micro galil with a different barrel. 30 carbine and 5.56 are pretty close in rim/base size, so the 5.56 bolt may work without any mods, or with minor tweakimg to the extractor.
Sven
Manticore Arms