AEG Air Nozzle Length Comparison?

[Wupjak]

I'm trying to find a chart that details air nozzle lengths for AEGs.

 

The application is a TOP 249 with a Version 3 PGC mechbox in it. The stock/M4 nozzle is too short and barely breaks the plane of the rear of the hop up bucking.

 

I tried an AUG nozzle, which was fine in the forward position, but wouldn't retract far enough to clear the chamber so a fresh round could be loaded.

 

I'd rather not grind down my metal AUG nozzle, but if that's the only choice for a midrange length, I guess I'll have to. I need something that's about 2-3mm shorter than the AUG nozzle.

 

Thanks for reading.