I've got an Armalite Mid-Length AR-15 upper receiver. This is complete, including the bolt carrier group, in the original brand new condition shipped from armalite (still in the box). The exact model is U15A4CB, and you can see the armalite product info page here:
http://www.armalite.com/ItemForm.aspx?item=U15A4CB" onclick="window.open(this.href);return false; (*exactly* what I'm selling here). These are 16" chrome-lined, front rail gas block, and flat-top. Very high quality hardware, it can be push-pinned into any standard ar-15 lower half and be ready to run.
I'm asking for $475, cash ONLY. I'm in Houston, near the medical center. It would be best if a buyer could meet me nearby to arrange the transaction. If you want this shipped to you, that is fine, but you must cover all additional costs associated with it, including shipping costs, paypal fees, or USPS money order fees. FYI, if you order directly from armalite, shipping will be $25.95, so you can figure out how much you might save.
I've also got some AR lower parts kits from Del-ton, $47. Same conditions for payment and shipping.