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Jefftron Leviathan install in a KWA with a 2.5+ gearbox or VM4 gearbox #jefftron #airsoft
Leviathan V2 by Jefftron GEARBOX installation guide
Kwa m4 Gate,gears, comp install preview see full diy build in my videos..#shorts #battalion
Jefftron Leviathan V2 | บอร์ดเลอไวอะธัน
The PERFECT Airsoft Gun Is Complete!
