Alright, so after some more research, I think this is what I will most likely end up going with:
Upper:
Spikes M4 7075-T6 forged upper
Geissele SMR 15" MK2 handguard
WOA 20" fluted S-DMR barrel (bead blasted matte black finish) w/ flash hider or brake. Bolt included.
Rifle gas system
low profile gas block (recommendations?)
Noveske gunfighter charging handle
bolt-less BCG
Lower:
VLTOR ARM-2C rifle modstock (purchased)
PSA MOE Lower parts kit (purchased)
2x 20 round M3 PMAGS (purchased)
DPMS A2 reciever extension & buttcap spacer (purchased)
DPMS rifle spring & buffer (purchased)
DPMS A2 buttstock screw(purchased)
Geissele SSA-E trigger
I haven't fully decided on the stripped lower yet.
Optics package:
Leupold mark AR mod 1 6-18x40 w/ mil-dot reticle
Burris 1" permanent PEPR mount
Accessories:
Harris S-BRM 6"-9" bipod
Some bipod mount (haven't really researched that
Pictures to come soon once I get the lower.