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Golden eagle GBBR M4 green gas magazine Hi-Flow Exhaust Valve & Inlet Valve* for GBBR M4 MC-318HF.
The exhaust valve has been custom hi-flowed to increase the muzzle velocity by 30-40FPS. than the stock standard exhaust valve. This is a very cost-effective upgrade for any GBBR owner. These hi-flow valves are suitable for Golden Eagle M4 GBBRs only.**
* Note: Only the gas exhaust valve is Hi-Flow, the inlet valve is standard as it is purely to fill the magazine and does not provide any performance gains.
**Note: pictures of Golden eagle GBBR M4 Magazine used for illustrative purposes only. Magazine not included, sold separately. These gas valves are only compatible with Golden Eagle GBBRs. Not suitable for other brands.