Thoughts/advice on a new build

[Txdiver]

Hello,

I have few .223 guns and would like to try put together a 6.5 Grendel build. I am looking for something that is accurate for paper targets <800 yards and could also be used to hunt deer/hogs at shorter distances. I will mainly be shooting the gun suppressed. I am slowly buying stuff as it becomes available but I don’t want to buy a component that isn’t a good fit.

So far I have: Aero lower & upper, Aero 15” handguard, cmmg lower parts kit, aero upper parts kit, bravo b5 stock, Harris bipod with ADM qd.

Parts I still need:

Barrel - 18-20 inches, budget is about $400
Gas tube & gas block - should I go adjustable?
BCG - I was thinking of just an Aero type II but I don’t know if I should worry about head spacing
Trigger - thinking MBT 2-stage
Buffer system - any thoughts on what type of buffer?
Charging handle - was thinking PRI gas buster
Muzzle device - I may skip this and direct thread or use a YHM QD muzzle brake since my suppressors already have the YHM adaptors

Does anyone have any thoughts/advice about my prospective build so far?

Thanks!