MT,
I have a DPMS .308 and it is head and heels above any ArmaLite I have ever shot. The one I have is as good as any SR-25 I have shot and this is with an 8-lb trigger pull. If you want a good trigger, get the JP trigger option. However, you have to find a load it likes. This one likes Federal 168 Match, Hornady 110gr TAP, and Corbon's 125gr HP's. These models are not considered Match rifles. Uppers matching with someone elses, I don't know. Would not want to use anyone elses.