20" .308 on top.
18" .308 on bottom.
Both are supposed to be rifle length gas system.
Top one has the shoulder/gas port located .25" too far forward. Means not enough gas tube seal in the gas key, so it was short stroking.
Unknown manufacturer, but I’ve seen identical style barrel markings on numerous cheap, problem barrels in the past year or so. When I ask the owners where they bought them, they all say, “Some guy at the gun show.”
18" .308 on bottom.
Both are supposed to be rifle length gas system.
Top one has the shoulder/gas port located .25" too far forward. Means not enough gas tube seal in the gas key, so it was short stroking.
Unknown manufacturer, but I’ve seen identical style barrel markings on numerous cheap, problem barrels in the past year or so. When I ask the owners where they bought them, they all say, “Some guy at the gun show.”