Watch and stop at the point in the video where the guy catches a mag from a buddy and loads it. The shape and size of the mag is very telling...it is shorter in length and is straight, no curve at the end like a 30 round .223. Kinda cool I've noticed in other threads people wanting a .308 ar varient. Also, just let some of you know that if you watch the ign rewind video one of the guys says that the gun has both a red dot and a acog...that is wrong. The front sight is an eotech and the optic in the back is a 3x multiplier.