BJTAC Mil-Spec Steel Dust Cover For M4 GBB (300 BLK)

MATERIAL：STEEL

COATING：QPQ

Fit GHK M4 GBB

VFC /WE M4 GBB may not be possible to put the cap on smoothly

For M4 GBB (It will not have full function on MWS)

If there is a tolerance in the hole of the pin, it can be replaced by the original pin on the original gun.

The tolerance of each brand may be slightly different, so it may not be possible to put the cap on smoothly, and it should be slightly resharpened according to the situation.

**All aftermarket upgrade parts require necessary skill or modification to install and assemble.
 Please refer to your airsoft gunsmith for proper installation / fitting if needed. Fitting  needed as the condition of each airsoft gun might be different. The actual performance is based on the overall setting on your airsoft gun. Please consult your airsoft gunsmith for advising.**

**No return /refund for any installion /fitting problem **