S&W M&P 15-22 Kaboom

Steve Johnson
by Steve Johnson

Eric, a reader of the blog, emailed me photos of what appears to be an out of battery explosion which occurred when he was shooting his S&W M&P 15-22. Luckily Eric was not injured. Eric said …

So I got my new S&W M&P 15-22 last week. I live in Canada (YES!! We can have those in Canada if you have Restricted weapons class on your PAL).

So I go to the shooting range last night. As I was sighting in the firearm at the 36 round I heard this kind of explosion and felt the hot gases on my hands and side of my face. I immediately looked at the breach and the round had exploded. Luckily I had my safety glasses and earmuffs. I did a quick check on myself…not a scratch!! but that hot gas felt like someone threw sand on my face and hans. I immediately took pictures with my cell phone then proceeded to extract to blown out round metal part and spring.

UPDATE: Fred at Guns & Coffee had a similar problem with his M&P 15022.

[ Many thanks to Eric for emailing me the photos and info. ]

Steve Johnson
Steve Johnson

I founded TFB in 2007 and over 10 years worked tirelessly, with the help of my team, to build it up into the largest gun blog online. I retired as Editor in Chief in 2017. During my decade at TFB I was fortunate to work with the most amazing talented writers and genuinely good people!

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  • Dan Dan on Nov 08, 2013

    I just had the same issue with mine. Lucky for me I found all the parts and assembled it back together. Works fine now. I saw the issue right before it happened. The bolt wasn't all the way forward, and before I could tell my buddy to stop he fired and had an explosion happened. I believe its not an issue withe weapon entirely. It doesn't have a FWD assist like a typical 5.56 cal. So if you just ensure your bolt is lubed properly and when you send the initial round forward that it is seated properly. Just test fired it and everything works properly. Thanks for the pics too, couldn't find any diagrams for the BCG. Putting it back together it just goes Spring, Pin (nipple out), Extractor Arm last. We took it apart again and put it back together.

  • Ed Lepczyk Ed Lepczyk on Jun 25, 2014

    Exact same thing happened to me. Blew the extractor out of the gun. Emailed S&W about warranty reapair four months ago and still no reply. Trying again today. Very disappointing.

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