Umarex (VFC) MP5K GBB Receiver Rear Cap Set

Umarex (VFC) MP5K GBB Receiver Rear Cap Set Polymer Construction Airsoft Receiver Rear Cap With Metal Sling Swivel Design For Replace the Original Receiver Rear Cap Set Suitable For Umarex (VFC) MP5K Series Airsoft Gas Blow Back GBB Airsoft SMG Submachine Gun