I used an all metal airsoft Springer Mauser,Filled in all the screw holes, ground off the funky selective fire switch and painted the grips with texturized paint. All of the added parts are Machined Aluminum from scratch. Turned the clip into a tibanna gas cartridge.
Inspired From A Star Wars Dark Horse Comic Cover from Droids that shows a Protocol Droid Turned Bounty Hunter. I used A Rubies C3-PO Helmet and found objects and threw in a little Tusken Raider Design For Good Measure. It is Totally wearable. The Red Longshot I posted in Paint modifications was a companion piece to this.