This is an inexpensive gravity-feed paint gun. These guns are
popular now, and a good-quality spray gun can be had for less than
$100.
This is the Devilbiss Millennium HVLP paint gun. It is a good value
for a top-flight gun. Note that the only air pressure adjustment is on
the regulator.
An inexpensive HVLP gun by ATD; note the painter’s hand is on the
air pressure adjustment. Setting proper air pressure saves materials