This suppressor was designed and tested on the Crosman 2240. It will also work with the Crosman 2250, 2260, 760 Pumpmaster and with the extended Crosman barrels commonly swapped on the 13XX and 2240. The suppressor uses 7 cone-shaped interior baffles to dramatically reduce the report. Installation only requires you to remove the stock plastic cap at the end of the barrel, align the suppressor with the barrel, and press it on firmly by hand.
This suppressor is FDM printed in black Polycarbonate plastic and the ID is drilled to size for a consistent and tight fit. The Polycarbonate material can easily be sanded, filed, drilled, and painted if you want to customize it. If it affects accuracy you can drill out the internal diameter little by little until you get the results you want (this will rarely be necessary).
Also, see installation instructions and report comparison below (note that this suppressor has been upgraded in quality and the front sight post has been moved since this video was published):