Do you usually shoot single shots and are you tired of fiddling with getting the pellet into the barrel (PR900 or PP750) properly ? This is a single shot magazine that replaces the standard single shot tray. Place the pellet in the single shot magazine and then slide the magazine into the rifle. Print 4 or 5 magazines and you can shoot single shots much faster, without the fiddling. Maybe the dimensions are adaptable to other Snowpeak guns.

The dimensions are very critical and the print accuracy affects the result. When printing, the layer height and line width influence whether the magazine will fit properly. So the more accurate printing the better. In particular, the height of the chute on the single shot tray (pelletSlideHeight) determines whether the pellet pusher passes through the pellet hole in the magazine properly.
Without a pellet, loading the riffle/pistol with the magazine should feel the same as with the single shot tray, so WITHOUT forcing !! Some very light finishing with a flat and round file seems almost inevitable. Testing starts with pushing a pellet through the magazine with a (wooden) toothpicker. The pellet should NOT fall through the magazine but should, with some soft presure, slide through the magazine. If needed use a file to gently widen the hole. Next try it in the gun without pellet. Then if needed gently file the bottom flat.

The default sizes are for the PR900W Gen 2 with caliber 4.5 mm (.177).
For the PP750 the numbers that worked for me: caliber 4.5 mm (.177) use: 4.5 0.3 20.0 20.20 18.0 15.0 4.45 0.8 1.8 5.0 2.0 5.0 10.6 . NOTE: I'm still waiting for 5x2mm magnets so thats untested.
All sizes are in the metric system.

Don't know why but the webbased customizer does not allow changing numbers so you may have to download the Openscad script. The json file contains the default PR900 values and those for the PP750.