Polarstar Airsoft JACK/F1/F2 Input Fitting for Drop-In Cylinder Kits (Includes Oring) (GG11-10)

Polarstar Airsoft JACK/F1/F2 Input Fitting for Drop-In Cylinder Kits (Includes O-Ring)

This barb fitting is used universally on all F2, F1 and JACK drop-in cylinder kits (1/4-28 threads). However, it is NOT compatible with the Kythera.