Well..................not really "building", but putting together another AR. Bushmaster upper. Have a bushie in 223 already, and another 223 I built from a kit, so 2 lowers I can put the 6.8 upper on.
Next purchase is the RRA NM 2 stage trigger (thanks Hunt for suggesting it) which I will probably purchase with an RRA Lower parts kit.
Sights..........well, hoping to get the kid (11 year old daughter) to shoot something fairly big this fall so am looking at a red dot. Shots for the kid and this caliber should be under 200 yds, preferable 100. So thinking the red dot will work better for a new shooter. I have a redfield fixed 4 if the dot isn't working like I think it will.
Also need to get a 10 round mag for hunting.
Throw out your suggestions for any other improvements/necessities.