I bought my 15-22 at a gun show for $475 two weeks ago. (I also bought a S&W Sigma Allied Forces 9mm/ve with the Disaster Ready Kit)
Since then I've put about 550 rounds through it.
The first couple hundred was a mess. I had a fail-to-eject the first time I pulled the trigger. Not cool, as I was very excited to get this gun for some backyard plinking since my AK-47 is just way too much gun for that. (The AK is stored with 1000 rounds of ammo and 15 magazines ready for doomsday action)
Along with the M&P 15-22 I bought the last few hundred rounds of .22 ammo at the entire gun show. Unfortunately, as I learned later, that Remington ammo was garbage. I also purchased a rail riser and quick release scope mount both made by NcStar.
So for the first couple hundred rounds, the gun would fail-to-eject every other round, and I had several fail-to-feed issues in the beginning as well.
At one point, I had an open breach misfire, which I believe was caused by a fail-to-eject event. That resulted in the loss of the extractor and spring from the bolt. Again, not cool. That was LOUD and I'm glad I'm not a left handed shooter.
Since then I've done some reading and tinkering with the gun. I quickly learned that you must take your time loading the magazine, ensuring all rounds are inserted properly. I've also adjusted the ejector rod which has been the greatest single improvement to the operation of this rifle.
After adjusting the ejector rod, but without the extractor, the gun would fire and eject the spent casings ALMOST every time I pulled the trigger. But since I've replaced the lost extractor and spring, the gun now performs flawlessly.
I've added a sling and a scope and am using higher quality ammunition. So after some patience, learning and simple modification, this gun is performing as I hoped and I couldn't be happier with it. I'm glad I was able to take care of its issues without having to send it to S&W. The last thing I wanted to do was have to give back my brand new toy!
I compared it to the other .22 AR-15 style guns on the market and am confident I made the right choice. It's light, has an
almost endless supply of accessory rail, is well designed & constructed and has no "fakes" like the faux bolt release and forward assist found on other models. The S&W model also has a solid barrel which is nicer to have than the sleeved barrels of the other brands. All that and it's the least expensive of the bunch? Yeah, I got the the right gun...
So all in all, it took a little time to get to know this little gun and what it needs to run properly, but I'm definately pleased with it and look forward to sending a lot of lead down range.
I hope all of you are as happy with your rifles, and if you're not, just take some time like I did to make it right, or spend some time shipping it to S&W. Either way, you're sure to love this gun.