Trying to understand if I need some kind of Lipo regulator to protect my RX and servo? I am using a XXS TC esc, sr3000 rx, and a JR Z590 servo. Will the ESC act as the voltage regulator? The lipos I have are 2C 3800.

If you're talking about a typical electric setup, yes, the esc has a BEC that will send rcvr and servos a regulated voltage and amperage. You shuold be able to find esc specs on the BEC output.

This is only a potential prob if you're trying to run a lipo rx batt like for a nitro setup.