Not that any of the USA vs USMC crap even matters. When it comes down to it the entirety of the US Military, except for the special forces of each branch, all practice the same principle when it comes to combat... Accuracy by volume. i.e.. we will put more lead downrange then you, so we dont need to shoot all that well. Dont believe me? Watch any youtube video, combat video, etc, and tell me how many Soldiers/Sailors/Marines/Airman are pulling off single shots and how many flip that selector to F/A and let it rip.