This has been a long time coming with several starts and stops. In addition to DPMS lower and 20" upper, I added:
Troy low profile free-floating hand guard
Harris bipod on an
American Defense QD auto lock mount
YHM gas block with flip up sight, and
Geissele two stage trigger
Slash 308 heavy buffer
Installing the free-floating hand guard was the hardest part. I bought three different barrel nut wrenches, none of which fit. So I used a pipe wrench. After that everything went smooth. Fired 30 rounds so far to break it in without a single issue.
Next up is a quality scope (suggestions welcome, PLEASE). Right now it's a cheap Pentax I already had on hand. Then, camo job!
Picture is with detachable carry handle.
Future addition may be a butt stock upgrade, again, suggestions are welcome.
Will the options ever end? ?????
Forgot to add, on advise from others here, I buffed the chamber for a few seconds using a cordless drill with a .410 mop and polishing compound while unfired. I was surprised at how much black crud ended up on the mop. Glad I did it, no issues to load or eject.