I just built up my first AR15 in 223 Wylde. Primarily going to be a truck/calling rig for dogs, and also a longer range steel plinker out to 800. Plan is to shoot the 52g eldms/53g vmax for dogs and 73g eldms/75g BTHP Match for longer steel.
Aero Lower, LaRue MBT Trigger, Laruth MBA-1 Adjustable stock, MOE K2+ grip, WOA 20" Krieger 7.7 twist upper, Warne 20 MOA mount, Burris E1 Fullfield 4-14x with LR MOA reticle. Comes in right at 11#
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You might consider getting a nice free float handguard to get some more accuracy from that rig, I wouldn't want a nice Krieger hamstrung by a 1986 handguard!