• 6-position adjustable stock: Magpul CTR
• Charging Handle: BCM/Gunfighter Mod 4
These for sure... they were the first 2 things I swapped out
Another thing you may want to consider is the Magpul Enhanced Trigger guard (or any other variant).
• Lower Receiver : Spikes Tactical Lower
I find that off grey colour of the NEA only works if you have the matching upper and handguards (unless you have a coloured handguard). So you'll find it stands out more with the black Stag upper. It's an esthetics thing for sure, but they're only a little more than the NEA
For your gas block and front sight, it depends if you want to go with the standard A2 FSP. If you do end up with that, then try to get the barrel with the FSP pre-installed, as the taper pins will be matched for the barrel and FSP.
For the BCG, get a quality one, Daniel Defence are hard to get as they keep going out of stock...
For the handguards, there are a lot of options... the NEA ones aren't bad, I just don't like the colour and the way the mount looks, but it seems like a decent set. But I'd go Daniel Defence or Troy.
Personally, Wolverine Supplies, Questar and Brownell's will be your best friend. That's where I got all the parts for 2 ARs.
For magazines you're going to want some LAR-15's, and I'd replace the followers with the anti-tilt Magpul ones and Magpul ranger base plates.
This as well, except I just got the Magpul-L plates for my LARs... same difference though


















































