The accuracy of a rifle with a frag round have a lot of potential. I mean, if you're taking fire from a window you range find to the wall the window is on, add a foot and fire it through, the round will explode a foot or two from the combatant. Know there's four enemy in a vehicle, range find and aim for a side window.

It will certainly change the way soldiers will fight, but the advantage is that the insurgents and less developed nations won't have the technology and likely won't have the understanding of it. Everyone knows grenade launchers lob the round. However, it's going to be very different when it's got the range and the level trajectory of a rifle.