Perhaps one of you can help me. I feel pretty dumb right about now. I bought 2 CDNN "universal" takedown pins for my Colt large hole lower. I need to mount one of the "small hole" uppers. I have a much older offset takedown pin (brand unknown) on the gun now, and it fits perfectly. Since I got another new upper recently, I can't get the universal CDNN pins to work. I just want to be able to use the new pins on my two colt lowers which are identical "sporter" models made in 1993.
What gives here? The lower and upper bind each other at about 80% closure, and then there is no further travel possible, preventing the gun from being closed. The upper is a brand new, Alcoa Forged (Stag, I think) and it fits perfectly with the old offset pin with no rattle, so it must be "in spec." Therefore, It is definitely not the upper or the lower.
Someone help, before I send the pins back. I already emailed CDNN to see if they could help, too.
Thanks in advance,
HTR