G&P 870 Piston O-Ring Version
thingiverse
Someone made a request for me to give this a try. This design is potentially an o-ring version piston for the G&P M870 airsoft shotguns and other clones. The model is based on an APS2 piston that uses o-rings because they are the same diameter, and the piston heads from the APS2 work in the M870s. I haven't printed this yet so I don't know if or how well it works but it's pretty simple and uses the same base as the original so I assume it will be good to go. The o-ring size you'll need is 20mm x 13mm x 3.5, which can be found very cheaply online.
With this file you will be able to print G&P 870 Piston O-Ring Version with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on G&P 870 Piston O-Ring Version.