TwinGunsLLP

Hi again everyone, I just wanted to say thank you to all who've replied, this is exactly the type of information I was looking for. I really appreciate the time each of you took to help me out, and will be looking into/keeping an eye out for parts to keep my M4 legal. Take care.

Hi everyone, I've searched this topic quite a bit on the internet, but I've seen varying opinions on the topic. I recently purchased a Benelli M4, along with the factory collapsible stock and a made in the USA magazine extension tube. The gun came with the stock tube and stock, and I was going to install the parts mentioned above when I came across some threads on the topic which concern me. I'd like to know definitively if I would make my M4 illegal by adding these parts. If so, is the gun only illegal with the two parts combined (so I could install either the magazine extension tube OR the C-stock but NOT both)? Any help would be greatly appreciated, as I have enough going on in my life that I wouldn't want to get dinged over something stupid like this. As well, I live in Missouri if this makes a difference. Thanks so much.