Re: DPMS .260 upper
I ordered the JP trigger installed by DPMS when I bought my LR308. The trigger just wasn't as good as the JP trigger I had installed by JP on one of my 5.56 rifles, so I called JP. Apparently DPMS didn't install the JP springs along with the JP trigger parts. I have no idea if it was an oversight, or if they were just trying to save a few bucks by not installing the JP spring kit. Technically, I did get the JP trigger, just not the full JP trigger pack I had expected (that usually includes the springs).
I bought the springs from JP, installed them, and the trigger is now every bit as good as the one I have had on my 5.56 match rifle for over a decade. I have had quite a few different "match" triggers on various AR15/AR10 style rifles, and have had great success with the JP triggers. I haven't gotten the chance to try any of the Geissele (hope I spelled that right) triggers, so I can't compare to them.