well in my personal opinion, mid caps aren't that great. yes they are not lame ass hi caps, and they hold more than standards and low caps. however, they seem to just not work. in theory its cool....kinda like the rotary engine and communism, but as you can see they didn't work either. i would say to go out and buy yourself a nice set of standard mags. I've used them all, when i was young and naive i thought hi-caps where the sh*t. then i found out how lame they where, then i thought lo-caps would be the answer. i thought the realism would be cool, then thinking about it after i used them and they did not work, low ammo, and your using a round that fires nothing like a real round. so i thought mid-caps where the answer...none of the rainbow prancing gayness of hi-caps, no low ammo amounts of low-caps....well they worked amazing at first, i bought them at LC6. after the op they went to shit....didn't feed, didn't stay together, didn't fit etc. no i'm rocking metal standards and they are amazing, always feed, always fit, don't break, and easy maintenance. So thats my opinion....use it, don't use it, whatever. hope this story helps....or at least entertained you for a bit.