Quality needs to be mentioned, I do not. 1A. The thing with the nozzles previous speakers had already addressed. Sure it's a little disadvantageous to use two different key sizes (12/13) for two nozzles, but you change this and not daily or even several times a day - and if they do then you can buy this a second with the appropriate nozzle, if you have frequently changing work , and not permanently screwed to the nozzle.
I would buy the gun at any time. Price + performance are OK.
Mfg