"Technical specs and accounting ledgers don't tell the whole story. In simulated combat, an OICW prototype showed the weapon's true potential. When the simulated hits were tallied, the virtual units firing M16s suffered 70 casualties. Those firing the OICWs saw only one soldier go down."
linkSaw them playing with one on Ermey's Mail Call. They were showing off how the laser range finder lets the trooper put a 20mm explosive round through a window and put holes in the guys hiding inside. Works the same way 'around' corners and walls. Bad ass.