Arcturus CNC POM Nozzle w/ O-Ring for Version 3 Airsoft AEG Gearboxes

"Since Evike can't be bothered to include accurate fitment or sizing information, or even accurate measurements of the products they are selling, I've gone ahead and done it for you - this is an "AK Short" (19.75mm) nozzle - it WILL NOT work with the 'AK Long' nozzle (20.7mm). It WILL fit in your gun if you have the long variant, but you'll get an absolutely TERRIBLE air seal (guess how I know!) - it took a stock E&L AK74MN down to 260FPS with 0.2 BB's on my local field. Once again, this is NOT for *all* V3 gearbox guns - it will fit in them, but it'll run terribly. Make sure to measure beforehand, now that you have measurements provided, lest you waste your money on this like I had to do to find out.

It probably works fine for the guns it is compatible for, but without this crucial information they had omitted, there's no way you'd know.