Bought this gun today and am asking the experts what over the counter ammo feeds through this weapon? As stated, the gun is a flat-top with a Simmons scope along with a bi-pod as the only add-on's. The serial number is BK010XXX and I believe this a post-ban weapon, correct? I have shot competively in the past with .45 auto's and this is my first semi-auto rifle. I believe this dude will drive tack's as I have read. I just would like some overall advise.