Daewoo Precision Industries K4

The Daewoo Precision Industries K4 is a 40x53mm high-speed Automatic Grenade Launcher in use with the Republic of Korea Armed Forces. It is very similar to the American Mk 19 grenade launcher.
The K4 was developed as a complement to the K-201 hand-held grenade launcher (attachable to the K2). 
History.
The K4 was first developed in 1994.
Design.
It has a weight of 65.9 kg and can fire up to 325 rounds per minute with a firing range of 1.5 km.
When needed to be used during night operations, a KAN/TVS-5 night vision scope can be attached onto the receiver.