Hey guys, ran into a bit of a problem with my M&P 9 and would appreciate any help/suggestions.
The problem: slide doesn't lock back on last shot
When racking the slide with mag in (empty), the slide does lock, so the mechanism doesn't appear to be broken. Also, on the last few shots before it runs out of gas, the slide does lock no problem. This makes me wonder if the gas I'm using (top gas @ 24C/75F) is too strong, but I tried it on 134a and the same issue happened.
My M&P 9 is all stock, except for a UAC trigger bar. I've also cleaned and re-lubed everything.
Thank