Bullet quiver that holds two extra 30-30 Winchester cartridges to the side of your rifle. These will fit standard m-lok slots using t-nuts similar to what can be purchased here: https://www.amazon.com/gp/product/B07FTCBD3L/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
I print these in PETG using 100% infill and .2 layer height.
The author remixed this model.