SMS Phaser Back

This is a simple replacement back for a Sega Master System Phaser light gun. It seems the original piece was prone to falling out and often got lost. I made this replacement for the phaser I bought off ebay.
There are two versions of the back. One is a simple snap fit that holds okay on its own. The other includes an extra piece that reaches inside the phaser and holds onto the screw column near the back. This version holds very well.