T238 Bluetooth FCU for Polarstar HPA Engine Nuprol this Upper Handguard can provide

this Upper Handguard can provide the perfect finishing touches to any Custom AK build

Invisible streamlined elbow pads pocket design

Manufacturer: Xcortech

Please consider the intended use for your AAP before you decide on your design

T238 Bluetooth FCU for Polarstar HPA Engine Nuprol this Upper Handguard can provide***For Android Users Only** Bluetooth FCU for HPA engine Compatibility: Polarstar F2, JACK, F1, Fusion engine Auto load function for gel ball blaster magazines Android APP Support 5~12. 6V input voltage Functions: Engine Type: This value is very important as it tells the control unit how many solenoids are used in the HPA system CB Mode: Allows you to select the firing sequence with double solenoid setup : Open Bolt or closed Bolt RAMP Mode: RAMP