http://www.military.com/daily-news/2016/09/01/investigators-army-consider-canceling-troubled-airburst-weapon.html Investigators to Army: Consider Canceling Troubled Airburst Weapon] - Military.com, 1 September 2016 A soldier equipped with an M4 carbine with an M68 Close Combat Optic, AN/PEQ-2 laser/infrared aiming device, weapon light, and 210 rounds has a 16 pounds weapon load.