I'm trying to convert to a M4 type carbine using the Tacticool barrel nut and an AR15 Delta Ring assembly. Firstly, I'm confused on the Tacticool directions on how to tighten the Tacticool barrel nut. And secondly, I have a Delta Ring, the spring, the circlip, and an AR14 barrel nut. I really can't figure how it all goes together. Am I still missing a part or what?