Well, hopefully the information I provided above is not incorrect. When Mountainman asked the question about recoil springs it prompted me to go check mine, since I knew I had some older ones, and had just received a couple of new ones which I ordered as part of a larger order for magazine springs. In my "spring box" I had the little plastic zip lock package from Rohrbaugh with 2 recoil springs in it from a previous order. Both of them are the same length. I then took the above picture comparing one of those older ones to the one I just received from Rohrbaugh. I suppose its possible that I had for some reason saved old used springs in that same zip lock package and just forgot they were used, but I doubt it. I wouldn't usually do that. Anyway, let me know if anyone talks to Karl.