Color Guard Rifle Bolt

My local high school colorguard group has a number of prop rifles that they use for performances where the “bolt” piece has been broken due to drops etc.   I wanted to come up with a design to replace that piece that is printable for quicker and possibly cheaper replacement.

This is not a perfect replacement, it does not match the original piece but instead is a broad brush shape and size match.   I created it with OpenSCAD (attached) and had to do the front slope in the 3mf file with a negative shape.