What ever you do, DO NOT buy a Rock River 2 stage trigger from John Holliger at Whit Oak Precision. My reason is simple, I want him to concentrate on building my new upper. Also, I think we are giving him a swelled head (not). Actually, I also heartily recommend the RR tuned by John. I have two. One I replaced in a CMP Bushmaster that wouldn't hold a first stage until I took it out and installed the RR.
Went to a EIC match recently and when it came time to weigh triggers, I got pretty nervous as my RCBS trigger pull gauge gives me 4.5 lbs exactly. Didn't really need to worry as the trigger easily handled the 4.5 lb official weight. Even so, the trigger "feels" much lighter. BTW, I have tried a Jewel in a friend's match rifle. It was okay, but I prefer the Holliger tuned RR.
Terry