hey I have a Magpul moe carbine and it uses the pmags but i use just regular m4 mags with it cuz i pit alil tape in the magwell. Im looking to buy bulk set of mags online or m4 mags and i keep seeing a lot of m16 mags. My question is are m16 mags the same as m4 mags? just so i can use them with my gun. Also would an m16 style box mag work with my gun? please help and let me know.