This is a 22LR bullet holder that can be mounted anywhere you can find space. There are 2 versions. One with screw holes and one without. They can be mounted with screws, double sided tape, Velcro, M-LOK rail (with the right hardware), or whatever else you can think of.

These are designed to be printed in TPU. If you want to print this in PLA or any other filament, you may have to adjust the size in your slicer to fit the bullets. I have not tested this in any other material than TPU.