I suggest that you get John Holliger's tuned two-stage trigger from White Oak Armament; break is very clean. When I bought mine, it didn't cost much more than the plain Rock River.
+1. I have two of Holliger's triggers installed, and a couple of factory installed RRA's in RRA NM AR's. All work well, I do prefer the way Holliger sets the final release. He sets the trigger so the first stage takes 3.5 pounds of force then it takes about 1.0 to 1.5 pounds more pressure to get the second stage to release. This has the weird effect of "feeling" that you are using a 1 pound trigger.
For those old enough to remember, it used to be that the Milazzo-Krieger trigger was "the" match trigger for the AR. I remember the AMU and the USMC teams used these, but the MK trigger had a weakness, there was this set screw that would come loose. And it was extremely difficult to keep it in place.
I don’t remember what the elite teams use now, I asked the USMC shooter I was squadded with last year, but forgot. They probably use the Geissele trigger. At at least $300.00 a pop, it is pricey.
Then the Compass Lake, Jewel, and Armalite two stage match triggers became available. As much as I like and respect Frank White of Compass Lake, his trigger has too many parts and requires a specialty lubricant. In time, it malfunctions. I find it humorous that Bushmaster copied the Compass Lake Trigger without using the precision machining and hardened parts that Frank uses in his shop.
Folks using the Jewel trigger started reporting enough troubles that the market walked away. The Armalite trigger has been an excellent design, I have one, went through one barrel with it, no malfunctions. It has to be filed to fit by someone who knows what they are doing, same as a untuned Rock River two stage.
As far as problems with the current crop of Armalite and Rock River triggers, you just don’t hear much. First time I heard of any problems with a RRA was in this thread.
It is my considered opinion, having seen all the problems that folks had with single stage AR triggers, the current crop of two stage triggers are more reliable. Back in the bad old days, a single stage tuned to give a nice pull would in time always malfunction. The usual result was doubling because the trigger notch/sear relationship had worn.
Now if you are happy with a ten pound pull and ten yards of creep, maybe that single stage will last forever.