After build a few of the 3s printed mod kits for the Nerf rival knockout, I was hooked on this blaster. Only one thing was wrong, there were not any available priming handles to replace the stock one that I really liked. I put together this ring pull so it's super easy to grab the priming bar without thinking about it. 

You will also need an M3x20mm bolt and matching nut. 

There are three ways to print

1. Print by object to have a ring a different color than the body
2.  Print by plate so there are no color changes
3. Print everything on one plate the same color

Feel free to share any suggestions for design changes!