Almost every weapon customization is a pop culture reference. For example:

The Captains pistol is from Firefly. Its plating form uses Shiny, which was a term for "good" on Firefly.
There is a phaser that jokes about Star Trek's redshirts saying "Aliens never attack red", which was the opposite occurrence on Star Trek.
Above the phaser is Han Solo's blaster, with a reference to the "Han shot first" meme.