APS - APM50 M40A3 6mm Rechargeable Cartridge AKM The hop up unit is

The hop up unit is very sensitive so we would suggest using 0

- Length: 215 mm

- Package includes: E&L AKM AEG

- Hop-up: Adjustable

APS - APM50 M40A3 6mm Rechargeable Cartridge AKM The hop up unit isSpecification: Material: Metal Alloy Feature: Made of Metal 6mm Caliber Co2 Refillable Design for APM50 only Grey Color Description: This 6mm Rechargeable Cartridge is designed for APS APM50 Sniper Rifle use. The design of this cartridge has patent. The gas won't leak by accidental drop. It is relatively safe compare to similar cartridge system found in the market. No Spring is used inside the cartridge, all the power and pressure are done by O Ring