I think you should ask yourself if you want to learn an entire manufacturing process, machine, software, and build the know how to do it; or if you just want to make lower assemblies. If it's the latter I'd suggest getting a mold and pouring resin. If it's the former and you're set on it, you're going to need quite a bit more than just that machine. Printing nylon can be very difficult if you don't know what you're doing. You'll need a way to keep the moisture out of your filament since nylon loves to suck water out of the air. You'll more than likely want an upgraded build platform, and if you're doing that you might as well upgrade your extruder assembly with a hardened nozzle. /r/3dprinting might be a better subreddit to venture over to. I will warn you, a lot of people won't touch this since it's related to firearms.