The ZH-05 OICW is pattered on the original XM-29 design. The Chinese gun combines a 5.8-millimeter rifle and a 20-millimeter smart grenade launcher in an over-under configuration. The new weapon weighs just 10 pounds fully loaded—its low weight likely due to the launcher’s antiquated, but still effective, manual bolt action.
A 19th-century-style bolt action on a modern grenade launcher might seem like a technical weakness, but it’s actually a strength. The action is dead simple to use and has fewer parts that could break. Any loading system designed to be faster would also be heavier.
“China’s Got a Supergun“, Medium, March 2014.