TNT APS-X Hop Up System Inner Barrel Retrofit Kit for GHK M ( 320mm ) Grenade And all V2 kit are

And all V2 kit are standard equipped with 10

- Built Material: Nylon

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TNT APS-X Hop Up System Inner Barrel Retrofit Kit for GHK M ( 320mm ) Grenade And all V2 kit areTHIS NEW amazing system was especially developed to replace and upgrade the entire GHK M4 hop up structure. with the ongoing demand for quality upgrade parts for GHK M4, TNT AIRSOFT STUDIOS has developed this kit which includes all necessary parts including a gbb hop up bucking and cnc hop up chamber. TNT APS X Hop Up System Inner Barrel Retrofit Kit for GHK M ( 320mm )