Looking to utilize one of our Amped Lines or other types of after market lines that are based on Foster type fittings? This fitting is specifically designed in mind for use with the Tokyo Marui M870 Shotgun. Gun Side Tubing Size: 8mmIncludes 1x Gun Side ConnectorCurrently this coupler (Fosters Type) is the main type of connector that the Airsoft HPA industry utilizes.
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