Just for the record, Rock River Arms guarantees their AR-15's for life also. (One of the many reasons I chose them over other AR-15's.) BTW: DHS purchases Rock River Arms exclusively, or so I've read...
Yes, RRA got the DHS contract... and the DEA contract. And they build a good weapon. I sold over 160 of them just on weekends during the summer of 2008. I personally own 3 of them, along with several other brands. But I’ve not been as impressed with their product as of late when compared to their product even as late as 1 year ago. Not sure what is going on at RRA, but something is not working the same as it was just a short time ago.