Dropping-in a new group on the AR was easy; this is something I'd take to a qualified Gunsmith to do. I wouldn't try it myself. Wrong adjustment on the trigger stop screw could be very problematic.
Crap, I'm sore as hell from riding that CAT Dozer yesterday; been a long time since I've been on a large piece of equipment and I forgot how much they beat you up.
42 posted on 10/27/2014 5:43:46 AM PDT by Carriage Hill
( Some days you're the windshield, and some days you're the bug.)