101Tech, the official distributor PolarStar Airsoft products announce the new PolarStar F2 Version 3 Engine... " We are happy to announce that the much antisipated F2™ V3 Conversion Kit is now available and ready for order. The kit comes with the new F2V3 Switchboard and the #2 nozzle which supports most AK models such as those made by G&G, Tokyo Marui and clones such as CYMA. However, be sure to stock our full line of F2 nozzles to expand compatibility with other rifles that use a traditional V3 gearbox.

As most of you are probably already aware, we assign numbers to our nozzles instead of using the rifle model. This is because the nozzle length can vary between the same gun model when made by different manufacturers. This can be from the manufacturer designing the rifle differently, or from the thickness of the gearbox shell affecting how far from the hop-up chamber the cylinder sits. Therefore one nozzle length may work in different rifle models but not necessarily work in the same model from a different manufacture. For example, a #6 nozzle works in an E&L AK as well as a King Arms FAL and ECHO1 M240, but does not work in a G&G, CYMA or TM AK which use a #2 nozzle.

We are using the make and model of the rifle which the nozzle length originated from in the nozzle description but this does not mean it is the only rifle it is compatible with. We have started a gun compatibility database of rifle models and their recommend nozzle number on our website which you can use as a reference; http://polarstarairsoft.com/support-compatibility."