My chain. Thats the second one. But in truth it was scraps of 2 other broken chains. My son gets all the new parts and I get all the scraps. I think it has more to do with the tires. They seem to add much more bite and load when the buggy lands causing the chains to pop. The stock tires don't load up like these tires do.
This is the raw footage of the clip. You can hear the chain pop at the end of the clip
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