Z-Parts Steel Bolt Carrier for Umarex (VFC) M4 GBB Airsoft Guns

Z-Parts Steel Bolt Carrier for Umarex (VFC) M4 GBB Airsoft Guns Steel Constriction Design For Upgrade the Original Parts More Durable The Weight of it Will Kick Back like a Mule once it's been in Action and is Great for Continuous Precision Fire on the Opposition Forces Suitable For Umarex (VFC) M4 Series Gas Blow Back GBB Rifle AIrsoft Guns Length: 170mm