This sounds powerful
"Last year, the service began field trials of the XM25 Counter Defilade Target Engagement System, an advanced grenade launcher equipped with a laser range finder and onboard computer.
It fires a programmable 25mm round that is designed to go off just above—or just behind — its target. The concept is to create a lethal weapon that can hit enemies behind cover.
Precision weaponry is going to get really personal, you're eventually going to see an individual soldier dropping a round down a chimney."
Link:http://online.wsj.com/article/SB10001424052748704124504576118550237336920.html?mod=WSJ_hp_editorsPicks_1