basically all you need to do is replace the piston and the hop up unit in the VFC other than that i think the stock gear set is pretty solid. the Gearbox shell i know is deff really good
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Current Lineup:
VFC HK416 Custom
Custom Bowie Tactical x SAI Glock 17 (TM Base),
Custom SAI BLU Glock Build (Timberwolf Base)
Custom Zev Noveske Shooting Team Glock 34
Project Guns
Custom Zev Dragonfly G17 (Project) (In progress)
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