Dude, I don't know I've never field stripped a G36, or seen a schematic of the internals. But if it has a spring loaded ejector they are making a mistake. I would be very surprised if it does.
Name one reason why a tiny plunger, roll pin, and spring, that can be jammed up by something like a 1/16th of an inch brass shaving is somehow superior to a cut in the bolt and a big chunk of metal on the inside of the receiver like an AK, FAL, G3, FNC, M96, Galil, or Aug? Does this part fail very often, no, but can it fail, yes! And its nothing that I read out of a book, it is something that I have done for myself. You have to get some punches and tear the bolt apart to clear that malfunction.
The Garand has a spring loaded ejector, as does its offspring the M14. But have you seen the size of that thing! It is nothing like the sissy ejector on an AR.