echang86

Are you certain? I thought the 91256 was the only one that was completely Nitrite, and the 91254 was the same as the 91255 but black.

I have a M&P9L with the Apex Forward Set Sear kit and Apex RAM installed. This gun also has one of the original smaller sear springs and sear block. I went 1500 rounds without cleaning before I experienced this issue as well. But instead my problem wasn't discriminate to how fast I was shooting. Slow fire or double taps, the sear never reset after shots. I ended up cleaning the handgun and I don't have this problem anymore.

The 9L was discontinued. I have confirmed this with a S&W rep. I don't know when they stopped production, but I saw rumors about it floating on the internet earlier this year.