The Umarex GLOCK 17 Green Gas 20rd spare airsoft magazine by VFC is made from heavyweight aluminum, giving a hefty feel to the G17 airsoft pistol. This green gas Umarex magazine has a high-efficiency internal gas system providing excellent FPS output, and reinforced valves and seals for optimal gas retention. This magazine works in both Gen3 and Gen4 G17 airsoft pistols, as well as G18, G19 and G19X airsoft pistols. We recommend using Valken Green Gas with this gas pistol magazine.
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