The S&W M&P 15-22 is pretty much the best thing going when it comes to rimfire training carbines. One of the best things about it is that it has affordable, easy to load, and reliable magazines. Unfortunately, due to the feed tower design of the magazines they don’t always fit well in the same mag pouches you use for your centerfire carbine.
Enter the RETA Kydex M&P 15-22 Kydex Mag Holders. They are 2 piece, “pancake” style mag holders that ride close to the belt. It is nice to see serious support gear for a rimfire carbine that is capable of serious training.
Check out the RETA Kydex Facebook Page.