I run a number of pumps and compressors, check out below for information-
5gpm Cat Pump-
This compressor is my main compressor, that puts out around 8-10 CFM at 90psi. It is able to run both my guns, but if I need the additional air in marginal temperatures, I will run the direct drive as well. Also if I want to run all 3 guns, I need to run both compressors.
I just picked up a new harbor freight compressor the other day, so it helps with my air output.