Based on Ryan Nagata's https://ryannagata.com entry and winner of the RPF Dr Grordbort Custom Raygun contest.

Modeled in 3ds Max, Normal / AO Bakes in 3ds Max, Textures in Photoshop, Renders in Marmoset Toolbag.
2k PBR maps for Raygun, and separate 2k maps for Missiles.

Thanks for checking out my work!