I have a Sigma 9mm that I had to send back to S&W twice for repairs. It's brand new I was having several mis-fires. The firing pin hits the primer but it appeared to be off center. Out of a magazine of 16 I'd have three or four that would not go off. I could put them back in the mag and they would fire. It happened with three kinds of factory ammo as well as reloads. The first time I sent it to S & W, I got it back in less than a week and the letter they sent with the gun said they changed the striker. I thought WOW, those S&W guys are on the ball! But when I fired it the problem was still there. I sent it back again with a longer, more detailed letter and told them they had to fire it several times, not just once or twice. This time they had it over two weeks. I finally got it back last week with a note saying they replaced the barrel this time and after firing it about 50 times with zero misfires I would say they got it fixed.
It's a good gun and Smith & Wesson stood behind their name and fixed it.
