I just bought a M&P 22 and have a few questions. I want to change out the stock but am not sure if it is a Mil Spec tube or a Commercial tube. Also has anyone been able to get a Magpul B.A.D. style lever to work on one. I have one on my regular AR and am so used to shooting with it it that I kept reaching for it on the 22. This is going to be a fun gun/cheap trainer for me so I want to keep the two rifles as close to each other as possible.