Anybody know whether or not a Magpul angled foregrip (http://cdn.magpul.com/images/uploads/64_334_popup.jpg) will fit onto the bottom rail of the standard M&P quad rail, when there is also a bipod and vertical foregrip on the bottom rail too? I really want an afg, because it's more comfortable when carrying the weapon in the downward position. It's a bit awkward using the vertical foregrip when you're walking around with the weapon down, but I definitely want to keep it on there, because it's a lot more comfortable to shoot with. I was hoping to put it in front of the vfg, but behind the bipod. I just don't wanna spend $35 or so to get something that isn't even going to fit onto my weapon!