22lr Snapcap

thingiverse

I designed these to be inserted into spent 22lr cases which can then be used for cheap snapcaps. I tried just printing the entire snapcap but the rims didn't survive too many pin strikes. The fit is pretty tight as is, but I'd recommend gluing them in just to be sure. If you want to re-use the printed insert when the brass rim wears out, a couple drops of wax inside the casing can be used as the adhesive to hold them in. When you're ready to change the case, just heat it up enough to soften the wax and remove the printed part.