Well I ended up going in a different direction. Since this AR has a low profile gas block and no FSB, I'm going to turn it into a mid-range DMR type build for target practice and hog hunting.

Here's what I've ordered so far:

1) Free-floating rail/handguard.

Centurion Arms C4 M-LOK Rail (12in)
https://centurionarms.com/c4-m-lok-rail-12in/

2) Stock

Magpul DT-PR Carbine Stock (backordered, have a spare in the meantime)
https://magpul.com/dt-pr-carbi...?mp_global_color=118

3) Trigger Guard

Magpul Enhanced Trigger Guard, Aluminum
https://magpul.com/enhanced-tr...?mp_global_color=118

4) Sights (Backup Iron + Red Dot or 1-? variable)

Optic: (still not sure, probably something like a 1-6, 1-8, or 2-10)

Backup: Magpul MBUS Pro (front & back)
https://magpul.com/firearm-acc...sights/mbus-pro.html

5) Different trigger?

LaRue Tactical MBT-2S Trigger
https://www.larue.com/products...ical-mbt-2s-trigger/

(already had one laying around, will consider Geissele SSA in the future)

6) Other attachments? (vertical foregrip, etc?)

Magpul MOE+ Grip
https://magpul.com/moe-plus-gr...?mp_global_color=118

Sling & Attachments (Undecided. Want to get a feel of the gun when it's put together before choosing.)

Bipod?

Thanks again for all the input. I'll post pics and thoughts once I put her all together later this month.