Ninja Paintball operates a decent sized machine shop located in Illinois, USA. Hustle Paintball produced a factory tour in 2014 which was published by PBNation.
Below is a highlight video showing some of the Vanguard Demon being machined using a Cincinatti Lancer:
Permalink: https://www.youtube.com/watch?v=_fTZ3-EESZg
The video shows parts being made using some of the following: Mazak FH-580/40 horizontal CNC, several Brother TC-S2D vertical CNCs, Star SV32J CNC lathe, Tsugami SS32 CNC lathe, and a Tsugami BE20-V CNC lathe. These machines are all tuned for high production with minimal manual intervention.
