well, i happened to have the rifle with me when i went to visit an FFL holder last night to pick up my new handgun
.....just so happens he's worked on plenty of AR's and offers to take a look at it
so everything checked out as far as the parts being installed correctly...but he initially questioned the origin or manufacturer of the trigger parts kit and their quality...
well after a good check up it was of his opinion that the parts (were poorly made), mainly the hammer and disconnector were not operating together or consistently as they should and therefore not reseting completely the same way everytime.
i had an extra brand new stainless steel lower parts kit (both of these kits were single stage triggers) purposely on hand as an alternate and after he put the hammer and disconnector in from that kit the result was no different.
He had an extra DPMS kit laying around....put just the hammer and disconnector in form that kit and it worked just like it was supposed to....everytime, no hang ups...
lower parts photo/comparisons and range report to follow this weekend.