Ok, now I'm confused. Soon after I got my R9S (in the first batch shipped), I had my dealer order me a replacement recoil spring because of the 500 round replacement advice. My dealer spoke with either Eric or Karl (I can't remember which one) when he placed the order, and he was told that the 500 round spec was in error, that the recoil spring should last +4,000 rounds. I got the spring anyway and a spare mag.
So are we now back to 500 rounds?