I'm new to the forums but have a few years of firearms ownership under my belt. I bought my first .223 rifle about a month ago, An M&P15 Sport 2, and I absolutely love it. I plan on putting a bit of cash into the mods of the rifle and have looked into the PDW style stocks that have started coming out recently. I like the look and the overall shortening that it gives the AR platform rifles. My question is this, will any of these PDW style stocks fit a factory lower/upper of the M&P15 Sport 2? If anyone knows of these mods or has done them themselves please jump on board. I plan on jumping on one of these stocks ASAP. Thanks in advance.