The Battle of Wanat. Photo Credit: CNN.com U.S. Naval Institute, Kirk Ross, 2010. Harsh environments and propellant gas are leading to malfunctions in the M4. . Photo Credit: Military.com. Direct Impingement Systems allow propellant gasses to blow back into the receiver and solidify. .
Photo Credit: CNN.com
U.S. Naval Institute, Kirk Ross, 2010.
Photo Credit: Military.com
Video Credit: Calguns.net
Photo Credit: www.cleveland.com
Eugene Stoner’s Patent for the direct impingement system.
“The Army’s M-4 Carbine: Background and Issues for Congress”, Fieckert.
Photo Credit: Otistec.com