The delta rings sold by ant-supplies also work as well (I've got ICS sports lines with MOE hand guards), the wings on the barrel need to be filed off, and an end cap (not sure on exact name) will also be needed, also sold by ant-supplies.
The delta rings sold by ant-supplies also work as well (I've got ICS sports lines with MOE hand guards), the wings on the barrel need to be filed off, and an end cap (not sure on exact name) will also be needed, also sold by ant-supplies.