MA doesn't allow collapsible stocks, bayo lugs or flash suppressors. We can mount a brake, but it needs to be permanently pinned in place. We can also use Pre-1994 large cap mags.

The m&p ships with a blank barrel end (no threading) no bayo lug and a 10 round mag in addition to a fake collapsing stock. the carbine buffer tube isn't even a standard tube. It's rifle lenght, but drilled internally to accept a carbine buffer and spring. The stock screws directly to the buffer. You cannot move it in because the buffer would stick out. If I were to put a collapsible stock on, the buffer tube needs to be changed.

To change the stock to an A1 stock, I had to purchase the stock, a rifle buffer tube, spring and rifle buffer. I also bought an Otis cleaning kit that fits in the buttstock.

In person, the proportions look great, and it feels great too. I had the magpul flip up sight on mine, but love the detachable carry handle look.

The rifle feels perfect to me.