Here's a link to a forum discussion on it... RRA doesn't have a full production contract but my sergeant buddy overseas says there's a scattered mixture of Colt and RRA as colt can still produce them for the USM. I can't see RRA having the same ability to pump out as many as Colt could, as I read a Colt M4 Carbine takes around 3.5 hrs to manufacture.
Thanks for all the recommendations and advice. One last question, anybody have a price of the Colt 901? Ive looked and havent been able to find one. And i agree with mj, I'd like to see some of those RRA's down range.
As a few people have mentioned, rocky river makes a great product. I have also heard good thing about the new core 15's coming out. But as I haven't shot one myself I can't vouch for this. Might be worth looking into.