Well, I have had a new M&P 340 on layaway for about six months now. The M&P 340 is a "Centennial" style, internal hammer J frame with a 1 7/8" inch barrel, alloy frame, stainless steel cylinder and a XS Big Dot tritium front sight in .357 Magnum. The whole gun is matte black. Pretty much my ideal carry piece with the exception of the retarded internal, frame mounted safety lock. Anyhow, I just paid it off and brought it home earlier this month. I took it to the range and fired four rounds of mild .38 special. On the fifth shot, nothing happened. The cylinder indexed, but no bang. Right when the hammer and sear felt like it should break, it locked up. This same cylinder will fail to fire no matter where it is at when the cylinder is closed. It could be the first shot or the last shot or one in between. But its always the same cylinder. I took it straight back to the shop I bought it from and they sent it back to S&W. I called S&W to complain and try to extort a set of LaserGrips. That didn't work. The revolver will be repaired and they will send me something for my trouble. Who knows, probably a shirt or a hat. Maybe I'll have to stick with my 640, its proven to be reliable.