Quoted:

1.Stock: Magpul CTR $59.95
2.Buffer Tube, Buffer, Buffer Spring & Accessories: Spikes Tactical $69.95
1. https://dsgarms.com/mgctrstockkitblk
3.Rear Sling Mount: ASAP Ambidextrous Sling Attachment Point $29.95
4.Rear Sling Swivel: QD Sling Swivel $14.95The CTR has sling swivels built in.
5.Grip: Magpul MOE-K2+ $24.95
6.Trigger: Geissele SSA-E $240.00
7.Charging Handle: BCM Large $49.95 Personal preference, but I'd go with the AXTS Raptor
8.B.U.I.S: Troy Ind. Dioptic Folding Sight, Tritium $164.00  Again personal preference, but I'd go with the Magpu MBUS Pro
9.Red Dot Sight: Trijicon MRO with American Defense Quick Detachable Mount $493.00
10.Upper & Lower Receiver: Mega Billet Standard Upper $206.00 / GTR-3H AMBI Lower with built in Trigger Guard $237.00
11.Hand Guard: Troy Ind. Alpha 13” $199.00 I'd go with an SLR Rifleworks over the Troy, better handguard all around and depending on which one you get could end up being a bit cheaper.
12.Barrel Nut: Troy Standard $10.20 the SLR comes with a barrel nut
13.Barrel: Noveske CHF Chrome Lined Lo-Pro 16” $365.00
14.Front Sight: M4 Folding Sight, Tritium $144.00 Once again, I'd go with the Magpul MBUS Pro
15.Flash Hider: Yankee Hill Machine Phantom Aggressive $34.00
16.Vertical Grip: Magpul MOE $19.95
17.Gas Block & Tube: Noveske CHF Low-Pro
18.Bolt Carrier Group: BCM (MPI) $169.00
19.Lower Parts Kit: Anderson Lower Parts Kit minus Hammer and Trigger $31.50 I wouldn't bother with an LPK, you're replacing almost everything in it.  With what you have listed you'll need takedown/pivot pins detents and detent springs, a mag release and spring, a bolt catch spring and buffer, a buffer retention pin and spring, and a safety detent and spring.  Or just go here and build your own LPK and not need the next four items on your list.
20.Magazine Release Butten: Seekins Precision Billet Mag Release Button $5.69
21.Bolt Catch Release Butten: Seekins Precision Enhanced Bolt Catch Button $12.99
22.Safety: Seekins Precision Ambi-Safety Selector $39.99
23.Upper & Lower Takedown Pins: Battle Arms Development Enhanced Pivot/Takedown $29.95
24.Light: Elzetta Charlie Model C114 $205.00
25.Light Mount: Elzetta ZRX $35.00
26.Front Sling Mount: QD Sling Swivel $14.95
27.Sling: VTAC Padded Sling Upgrade $49.95
28.(KNS Anti-Roll Pins) $33.00 They're not needed and Bill Geissele recommends against using them with his triggers.
29.(Troy Ind. Squid Grips) $24.99
30.(RRA Forward Assist Kit) $13.50
31.(RRA Ejection Port Kit) $8.00
32.(Leo Armory Custom Ejection Port Cover) $38.95  

Quoted:
Great looking build sheet, OP.  and the suggestions are really well though out.
should be a stellar build.

Quoted:
A few things that come to mind:

-I don't see the need for tritium BUIS, especially when you will have a red dot and light. I've also found that the one set I do have, the front sight's vial wasn't the brightest and if it wasn't pitch black it didn't seem to help too much.

-From my build experiences, get the essentials first and don't buy the accessories until you have fired the rifle. In some cases this just allows you to get a functional rifle faster; for example if you get the BUIS first, hold of on the MRO until everything else is up and running (plus irons practice is always good). In other cases, it will make you stop and think about if you really need/want something you were planning on: in this case, you might get this handguard and decide you don't really want/need a vertical grip.

No doubt I will get the Irons first then Red Dot later. Vertical grip I put out there because it is just an example of how far I might go with the rifle if I do.

Lastly, I know I'd go with some different parts for budget/ cost-benefit reasons and that's a personal thing, but what makes that dust cover worth nearly $40?