Just purchased the Magpul series of the 15-22. The adjustable stock was nearly impossible to extend/retract (yes I depressed the release)! Upon trying to extend, the movable portion of the stock came flying off the secured portion that has the retention holes in it. I found a small piece of plastic on the floor. The stock can be reattached but flies off every time I try to extend. Anyone heard of this before? Do I contact S&W or magpul? Pretty peeved right now.