BrianSW99 wrote:The MDS doesn't interfere with the strikers movement through it's channel or the breach face. It works by keeping the trigger bar from contacting the sear, so when you pull the trigger it's not making contact with anything.
I don't think that's how it works on the SR9c (unless mine is defective). I can pull the trigger with the magazine removed and watch the striker indicator come back through the endcap and then jump forward as the sear is released. The only difference between with and without a magazine is that, if you drop a pencil eraser-first into the barrel against the breechface and pull the trigger, it jumps just a smidge with the magazine inserted, but not at all with the magazine removed.
There is no difference in trigger pull with or without a magazine inserted.
Since it hasn't happened in 200 rounds, I'm inclined to think it was a shooter-induced malfunction, but I'll probably pull the MDS out anyway, just to remove one more possible complication.