I just picked up a Stg-556 and was curious about something. In NO WAY do I intend to make my semi-auto rifle f/a. I mean in NO WAY. If you put a real Stg77 trigger pack in would you now have a f/a Stg-556? I am guessing it would take more than that bc the ATF doesn't allow guns to be "readily convertible". What if you put a Stg77 trigger pack in a s/a AUG? I'm just curious on the subject. Again, I in NO WAY intend to do this and I in NO WAY intend to purchase an illegal trigger pack. Also, there are RDIASs available for AR lowers to make them a legal f/a while the RDIAS is installed. Is there any legal trigger packs and/or a part to drop in a Stg-556? What I mean is something in the MG registry for an AUG that would also fit an Stg-556, similar to the RDIAS idea in an AR. If this was possible and of course legal I would be interested. Thanks for any info, and again I DO NOT intend to break ANY laws including the NFA.