Retro Arms CNC HPA V2 Gearbox PK126 Made of polycarbonate

Made of polycarbonate

In SEMI Mode

VFC have been producing HK416 and M4 GBBR series for a long time

"Semi/Auto ramping" fires in semi and switches to full auto if the trigger is rapidly tapped

Adjust your tanks to have different output pressure

Retro Arms CNC HPA V2 Gearbox PK126 Made of polycarbonateThis shell is machined just for HPA parts. The price is lower due to the reduced machining time (no need to accommodate AEG parts) and because no spring guide is included. These Gearbox Shells are fully CNC machined from a block of 7075 T6 Aluminum. This material is very strong and can endure a ton of stress. Anodized black for corrosion resistance. Comes with screws.