I was an MP in Korea during 1975 to 76. 142d MP Co, Yongsan Garrison Seoul. There were several Korean National Police (KNP) officers that stood gate duty with us on a regular basis. The empty holster was common. So was swapping the revolver from one to another as they changed shifts. We even had a box at one of the gates for the KNP's to park their revolver when no KNP's were on duty. Most often they had a backup KNP with a M1 Carbine nearby.
We also had a small stash of cash under the MP Desk to "assist" with the recovery of GI's that got a little rowdy at the Itaewon entertainment district Police Box. I never did find out why they called their local offices Boxes though. During my 13 months there I do not recall of a single KNP shooting in the areas. The local Koreans tended to be somewhat subservient to the KNP tactics and brutality when it came to controlling disorderly people. The police club was carried and used often. As a side note...the private ownership and possession of firearms was almost completely banned. There were few firearm armed criminals about. I might add that during my many soujourns downtown I never felt the need to be armed. Then again I was young, lean, mean and full of piss and vinegar. Getting old sucks.
The Republic of Korea (RoK) Army Military Police however were a very different breed. Sharp, stract and very physical. There was often problems with the North Korean infiltrators at the DMZ and area waterfronts such as Inchon. Lots of gunfights there but they were military. One did NOT mess with a RoK MP. As I was leaving the "Tree Trimming Incident" took place. Thought the Hot War was about to start. Korea was a very unique place.