Crusader (VFC) XM177 Stock Locking Nut for M4 AEG & GBB & WE X177

Crusader (VFC) XM177 Stock Locking Nut for M4 AEG & GBB & WE X177 Design For Repalce the Original Parts Suitable For M4/ XM177 AEG/ Gas Blow Back GBB Rifle Also Compatible With WE XM177 Series Airsoft Rifle