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PolarStar Airsoft JACK MINI Electro-Pneumatic Gearbox Conversion Kit (Model: M249), Accessories & Parts, HPA, PolarStar Fusion Engine/JACK/F1 - Evike.com Airsoft Superstore
BattleMonkeys Airsoft on Twitter: "Recently turned my A&K m249 Saw into HPA using @ampedairsoft Integral Grip Line Standard Weave and an Amped PolarStar Jack V2 HPA Unit. Cannot wait to turn this
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