Hello there, I've got a question that's been bothering me for quite some time now. I've never ever handled and/or shot an HK416, but I've always been interested in the rifle's history and function. And when I saw that there are different barrel lengths available with the 416, I was wondering if, for example, a 416 with the 16.5 inch barrel got the equivalent to a carbine or mid-length gas system or the same than the 11.5'?