Hi guys

I have a futaba 3pk with a 2.4 module in and a futaba receiver in my buggy,
I'm building another car and I'm wondering about the receiver , do I have to get a futaba receiver or can I get another brand of 2.4 receiver , if I do will that work or am I stuck with futaba, not that I have a problem with that it's just I see a lot come up on eBay and stuff and I don't wanna get stuck with something I can't use

You're stuck with Futaba since I assume you have their FASST module and receiver.

A knock-off FASST would be your only option if available, however, that is unlikely.