I believe I have IDed the base for K's holster. It looks like it is a modified version of the Safariland Model 1090 Gun Quick holster:

The only problem is that it seems to have been discontinued last year!
For more info, see my post in the BR2049 thread in the Props section:
https://www.therpf.com/showthread.php?t=276755&p=4353230&viewfull=1#post4353230

The only problem is that it seems to have been discontinued last year!
For more info, see my post in the BR2049 thread in the Props section:
https://www.therpf.com/showthread.php?t=276755&p=4353230&viewfull=1#post4353230