I'm pretty sure these are compatible, but I've made so many assumptions so far that turned out to be wrong, I really did make a you know what out of myself, and I don't want to repeat this. Anyway, I have a flysky i6 transmitter, and have a flysky ia6b receiver that are working fine together, as they should. I'm wanting to get more receivers rather than just trade mine out between other planes. There's a 2fer offer for 2 FS brand ia6b receivers on eBay for $25, which are identical to what I have. That's about how many I'm wanting to get as well. However, I see Hobbyking has Turnigy receivers for $10 before shipping that appear to be the exact same thing, just rebranded. I don't know which one is the name brand and which one isn't, but I wanted make sure they would work. After all the bad ebay experiences some of you have seen me have, I'd rather buy from hobbyking. Putting a link below to the receiver in question. Since my FS-i6 transmitter works with my FLToys plane as long as I switch the frequency mode, I'm pretty sure the afhds part is the main thing. However, before I take the plunge, due to all of my previous mistakes, I wanted to double check with people here first. Also, I did read through previous threads, and didn't see anybody asking about this particular type of compatibility.
https://hobbyking.com/en_us/turnigy-ia6-receiver-6ch-2-4g-afhds-2a-receiver.html
https://hobbyking.com/en_us/turnigy-ia6-receiver-6ch-2-4g-afhds-2a-receiver.html