MP5K-PDW for British Forces

Addition of an MP5K-PDW to the British Forces Arsenal.
Base model is the MP5K from Bristh Forces by TepacheLoco.
Addition of barrel and stock from the "MP5K" 3D model on Sketchfab shared by user "Ford Mondeo" under CC Attribution licence (link :  https://sketchfab.com/3d-models/mp5k-06fb66e4218d4b46842adcb30f4d2339)