I want to give this model (Atom X20 LVLP) and honest review based on my experience.
I purchased this gun in the Spring of 2018 where I used it once on a '94 F-150, all was good. A year later I shot a second vehicle and towards the end of the project, the inner seal/s started leaking. I was able to finish out the project, thankfully I only had vertical panels left to paint, otherwise, I would have gotten paint drops all over the place. I took very good care of the gun; cleaned it out thoroughly after each use, never dropped it and stored it in a climate-controlled environment.
Keep in mind these guns are made in the PRC (Peoples Republic of CHINA) and have no warranty. I found no customer support contact info on atomsprayguns.com or zoolaa.com. I wanted to see if a replacement seal kit was available. After contacting LABAP.com about this they informed me repair kits are not available and offered me 10% off my next purchase.
Bottom line is this. After barely shooting two cars the gun is useless. There is no warranty, no way to contact Atom, and no replacement parts are available. Also, as mentioned by another reviewer, the finish on this model has completely deteriorated after only cleaning with lacquer thinner.
If you want a spray gun that lasts, I recommend you spend a little extra money and purchase the SATA, IWATA, Devilbiss, or even an old Binks Model 7.
This is based on my own experience, other's may have better luck than I.