Swuishytacos Posted August 26, 2020 Share Posted August 26, 2020 I just brought some grenades and the o rings snap like straight away I'm assuming it's coz of how small they are. Can anyone recommend what type I should buy to replace ? Link to comment Share on other sites More sharing options...
Tommikka Posted August 26, 2020 Share Posted August 26, 2020 The pricy way is with a spares kit such as this: https://www.leesprecision.com/repair-kit-for-big-dragon-nuprol-40mm-gas-moscarts The cheaper way is to measure them and buy from an o-ring supplier such as https://www.polymax.co.uk They have instructions on measuring here https://www.polymax.co.uk/o-rings/o-ring-selector/ (or ideally find parts list/instruction manual which may have the dimensions in the part number) For the type of o-ring Nitrile tends to be the most common material Link to comment Share on other sites More sharing options...
Sneaky Posted August 26, 2020 Share Posted August 26, 2020 Also make sure you keep them lubed to prevent them from cracking. What gas are you using as that will have an effect in the rings. Link to comment Share on other sites More sharing options...
Swuishytacos Posted August 27, 2020 Author Share Posted August 27, 2020 Just green gas it was recommended by the supplier Link to comment Share on other sites More sharing options...
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