To extend the this question, how far can you go in terms of practicality? I've been messing with this platform for just shy of 10 years, and only within the last 2-3 years have been able to shoot long distance venues.
Having an 1800-yard gun won't be much fun if you only have 300-400 yard shooting venues.
That chipping showing in those pics shouldn't be happening. That's evidence of metal that's too hard and brittle, or distemper. I'd get a replacement bolt ASAP just to be safe.
Your "grit" could easily be very hard tiny granules of hardened chipped metal.
I bestowed that particular acronym upon realizing his uncanny ability to recognize idiotic types at extreme distance, thus the Dumbass Early Warning System.
Our policy by and large is to let folks stick around until we can get a full sense of who they are and whether or not they will make positive contributions to a community built around informing newcomers to the platform, and learning from those familiar with it and it's intrinsics.
So far the DEWS has been uncannily accurate, it's up to the newcomers to prove it wrong.
Shhhhh! You're ruining the bait-and-switch tactics we're employing! He's supposed to be keeping a cautious eye on me while Tom sneaks up and blindsides him...
You sir, are going to fit in here quite well.
I can already tell.
Lastly, it is actually you who has been discussing this build, so now you're obligated.
My current list has you at ~$1400 which leaves you with $1100 in the budget to pick a stock, pistol grip, muzzle device, and a bipod. I'd go with Magpul's new offering on the bipod, at $110 it's unbeatable.