Quoted: there are faq threads tacked at the top that should have the info.
would need the bolt group, hammer and a hevier buffer would be wise.
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Actually, I tried the FAQ and it looks like just another rambling thread with some information here and there not organized in a typical FAQ point form question/answer format. It didn't answer my question in the time I gave it (although maybe my question isn't "frequent").
Thanks why I'm thankful ARFCOM is a discussion forum.
Thanks for the info.
ETA: Oh look! I found something unformatted in a run-on string that is a response and I can't really tell if it's part of the "official" FAQs or just some guy who doesn't know:
quote]Quoted: Can a person mix and match Bolt/Carrier units for the Colt Style 9mm uppers, ie will a RRA or ASA Bolt/Carrier unit work in a Colt Upper (or the opposites)? yes quote]Are all of the various Mag blocks for the Colt style uppers interchangeable? mostly - might be an exception here or there Will a standard 5.56 buffer/spring work with a 9mm? yes - but 5.56 buffer springs in a telestock can cause problems in full auto, though.I don't know...I am still glad I asked.