Black Knight M4 CNC Aluminum GBB Outer 2 Piece Barrel System 9in. and 14in. for M4 GBB Black

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The Black Knight M4 CNC Aluminum GBB Outer 2 Piece Barrel System 9in. and 14in. for M4 GBB Black is the yin, to your yang. You've found what you're looking for.

Inventory Last Updated: Jul 15, 2025