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

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

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  • $39.95
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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 product you didn't think you need, but once you have it, something you won't want to live without.

Inventory Last Updated: Oct 16, 2026