Quote Originally Posted by The Extractor View Post
I wanted it to take AK mags and I guess I wanted a challenge. The x39 std AR mags are unreliable form what I read.
Not the ones I've used from C-Products Defense. I hear the 10 round ones are even more reliable because they lack the straight down and bend design the AR is forced to use. Honestly? In the standard AR upper/lower configuration, get yourself a Black Rifle Arms or Fail Zero Nickel Boron bolt and all the reliability issues disappear. The bolt is literally the make-or-break issue in this setup, so spend the extra and get it to work work right.

Not related, but I have something called a "Kali Key" mated to my original bolt done by a gunsmith here. I rarely use it but sometimes I put it in to try it out. I use steel case ammo. Does anyone know why when I fire from a single shot with the Kali Key, the bolt refuses to retract for awhile? Is it the steel case expanding in the chamber?