system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] Can non-Force users construct their own lightsabers? Has this ever happened?

From what I've read in other questions on this sub, there tends to be a lot of ritual involved in how Jedi and Sith create their lightsabers, but there doesn't appear to be any big secret to the technology of it. The blade is made essentially the same way as blaster "bullets", and the crystals can be found in lots of different places, or synthesized. Is there anything that would stop a dedicated "muggle" from building their own lightsaber and learning how to use it (even if they couldn't become as skilled as a Force user)?
gpt
Most of a lightsaber is commonly available, off the shelf components, and obviously anybody can lay hands on those and assemble them into a lightsaber-like configuration.  There's no tricks there.  
The kyber crystal is the issue.  Proper functioning of the lightsaber requires the crystal to be attuned and mounted via the Force.  Mundane mounting techniques apparently do not work.