Both Stag and Rock River are good rifles. They are very close as far as prices are concerned. I do believe that Stag follows a little closer to milspec though. Either way I don't think you can go wrong.
I have a STAG (CMT) lower with thier parts kit. It's been 100% reliable so far. I will admit that sometimes thier rollmarks/stampings for the serial numbers get a little messed up sometimes.........one of my numbers is "bolder" than the rest and it's a little out of line. But I'm a perfectionist. :roll:
Most people tend to rag on the deer head. I say "fear the deer."
You can find stag upppers with free ARMS 40 BUIS for around $515.....and I know of a place where you can get complete stag kits minus lower for $659 with the ARMS 40.
I like the DPMS, never had any problems with em. Have had Colt's and DPMS so not a lot of owner opinion on the others. I have built some DMPS from scattered/pieced together parts, all mismatch stuff (rob from peter to pay paul) and they all go together nicely. Only problem I've ever seen was a bent charging handle causing failure to feed/eject.
Unless you want me too but I would need a commission.
Remember that an M4 Type Bushmaster has an MSRP of more than $1,200 but they sell for a little less than that locally (well they do where I am) similarly an LMT may be available locally for a little less than listed on the website.