I'd second the build idea. 6.5 Grendel goes in the ar15 format. Matched upper and lowers are nice. You will usually find better fit and less rattle. Matched billet upperand lower even better. You've just missed some great sales on Mega which I highly recommend.
For uppers: VLTOR, Mega, Spikes, Aero, Lantac, Seekins
Lower: look for same as above
Barrel: my BHW/Columbia River is a hammer. Ar15 performance when available are hammers as well. JP and Rainier have offerings as well.
BCG: on the Grendel you need to make sure your bolt and barrel are matching Type I or Type 2 or there will be headspace woes. JP will get you a barrel and matching bolt. Go Young, JP, FailZero, Precision Firearms, Rubber City
Barrel: Hard to go wrong with BHW/Columbia River or ar15performance. Don't let the price fool you.
Trigger: CMC straight or curved depending on your preference.
Go adjustable on the gas block. Superlative has been nice as well as SLR for me.
Two months ago I was a black rifle moron....I've built 6 in 60 days so be warned they is addictive.
