Announced early this week, here now is the video showing installation of the Bingo Airsoft Designs MAC-10 Polarstar JACK Gearbox Replacement Kit... "This video demonstrates how to install the Bingo Airsoft Designs MAC-10 Polarstar JACK Gearbox Replacement Kit. The kit is designed for TM MAC-10 and JG MAC-10 AEP airsoft guns."
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