Quote Originally Posted by nisils14 View Post
Essential parts to any AR platform rifle.
  1. lower receiver
  2. lower parts kit
  3. rec. extension/ buttstock kit
  4. upper receiver
  5. bolt carrier group
  6. charging handle
  7. barrel
  8. gas block/FSB
  9. gas tube and associated pins
  10. handguard
  11. magazines


And depending on your parts selection you might need the following
  1. delta pack kit
  2. ejection port cover kit
  3. forward assist kit
  4. muzzle device
  5. barrel nut
  6. Rear sight parts


There is details I'm missing but that's most of it. It's a metric shit ton of options for just about every part imaginable, you just need to research it and figure out everything you want.
Watch these:
http://www.youtube.com/user/MidwayUS...ch?query=ar+15
Just basing it off the list you've made there it looks like I've got everything picked.out that I'll need, now.just to buy it all and watch my bank account cry a little hah. I have noticed that there are so many options for every single little thing on the gun, I ended up picking one or two options for each part that I liked then started researching both and comparing them and just narrowed my decision down that until I had it all sorted out.