Originally Posted by Officer of Engineers

It's already been answered. Too expensive for the marginal gain that it represents.



And it is obvious that you've never served in a National HQ. The G-36 was introduced way too late in the game - long after the M4 was introduced and committed to. There is absolutely no reason why the US should cancel the M4 contract and pay the penalty just to switch over the G-36. It ain't worth it.