I see.
Well, S&W really came through for me. What fast & great service!
On July 28th (Friday) I shipped my S&W M&P 40 back to S&W to have the new slide stop installed. A few days later I got a letter confirming they had received my pistol and I could expect to receive it back in 2-3 weeks. Well, today (8-9-06, Wednesday) I have it back in my hands, and BOY oh BOY do I love the new slide stop (release). I had already locked it away in my gun safe, waiting until I get a chance to shoot again (hopefully this Sunday). However, I just paused here long enough to go get the pistol out again. I tried numerous times to jam, slap and ram the magazine into the gun to see if I could get the slide stop to let go and let the slide go forward, WITHOUT using the lever, and it would not do so, unless I press down on the slide stop.
I do notice that even though the new slide stop (release) is much, much easier to get a thumb on, it still takes some effort (and maybe both thumbs) to push it down enough to let the slide go forward. Maybe it will loosen up in time.