Buffer tube and spring. Charging handle. I think that's it.
I have an INGO lower, complete upper w/o BCG or CH, LPK and a stock. BCG is next on the shopping list.
I have been buying new BCG's but I do have a MilSpec CH. I will set it aside.
I might have a tube and stock but no spring/buffer's. Used the last spare today inn the parts rifle.
I need to take some time and re-inventory.