I love how they leave out the Manufacturer, Model of the gun that beat out the M4, they designate it as "Gun C" My guess is it's piston operated, what else would it be, god forbid they admit the truth, Nay Sayers eat your hearts out.
Just more confirmation that piston operated Ar's have the edge, M4's are very reliable, but not quite as reliable as pistons.
Piston for life.
Does that justify the cost? Would you feel undergunned with a gas operated AR? If there was a firearm leaps and bounds ahead of the AR platform while also being comparable in cost everybody here would have one. Military needs to be cost conscious, just like the rest of us.