As of right now im not "producing" anything, but if you'd like you can send me your WE/RS buffer tube so I can get the thread pitch and specs and Ill make a 66 for ya.
The Rails I just kinda drew up on a boredom day, I have one issue with the rails and its when you charge the weapon if you wrap your finger all the way around the charging handle you might grind your finger across the tops of the rails. So I just half finger the charging handle. If you'd like a set as well let me know.
As for part #15, Ill have to rip my scar apart and see which part it is as well as what it would take to make it. Might have another winner on my hands =)
So if you want the 66 and rails PM me and we can discuss all that.
Thanks for the intrest