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Also looking for an M4A3, preferably RRA.

I don't know much about the AR series and I want to buy and learn more about them.

Location Houston/Austin/San Antonio

PM me.

Thanks.

Best way to learn about them is to build one. It's not that difficult to build a lower receiver, but i'd go with a completed upper until you get up to speed.

You may have already checked it out, but if not:

For more info than you probably need: http://www.ar15.com