Have a Mid-length that I bought through Western Sports online. I have had it for a couple years now. No issues what so ever.
I also built a 7.5 pistol with the AA kit. It came with the carrier key replacement. <<BAD>> replacement key bent and broke the drive rod. I called Adams Arms and they sent me a one piece carrier and replacement rod. At no cost...AWESOME!!! Since replacement of the one piece carrier I haven't had any issues.
Great Company and their products are great...