>I suspect it was more about being lighter and carrying around more rounds of the smaller lighter ammo. And viable automatic fire. Yeah, technically you can ha

>I suspect it was more about being lighter and carrying around more rounds of the smaller lighter ammo. And viable automatic fire. Yeah, technically you can have a full auto M14 but 5.56mm and 7.62x29mm are really in another league compared to 7.62x51mm when it comes to controllability.