Hey everyone, happy Independence Day weekend! I have what might be a stupid question. Recently purchased a M&P 15 sport 2 (NJ) compliant. I ordered 2 different stocks to replace the factory one. A Magpul and a strike industries. I was under the impression that the sport 2 was Mill spec. But either one of the stocks fit. Way to tight. They won’t even go on. I am new to all this, but am I missing something? Thanks for any help.