Got a SW M&P-15 Sport for my Bday, my first ever rifle.
Replaced the hand guard with UTG carbine quad, add a Magpul angled foregrip and a well grip.
Trust me the mag is in there... the well grip swallowed it.
Hasn't fired it yet, maybe this weekend? We'll see lol.
BTW mine came with a Magpul MBUS 2 folding sight OTB... almost bought one at the gun show a few weeks back!