Ok, I finally took my MK68 barrel and upper parts in for assembly on Friday and took delivery yesterday. I don't have a range report yet but I will try to get out this evening. Here are the details:
AR Performance MK68 Barrel
YHM lo pro gas block - pinned by ARP
Knight's Armament URX II rifle length rail with integral front sight
Knight's Armament micro rear sight
Colt M4 upper reciever
LMT 6.8 bcg
LMT Tactical charging handle
LMT complete lower w/SOPMOD
Planning on a Trijicon TR24 1x4 optic in a Larue mount.
Thanks to AR Performance for bringing to market what appears to be a great product in the MK68 barrel, thanks to Casey at Lawmens for assembling the whole mess, and to those here who provide an invaluable resource..
My camera recently took a fall and does not focus very well. In any event, this is the best I've got for now.