I love my „Cool Making“ antenna (first image in thread). Light-weight and I am getting good reach in excess of 3km (FCC signal). Couldn‘t find the actual limit because battery is a limiting factor now. I also use it more for „behind the trees“ flying.
I had my RC already modified for external antenna (cf. other threads here). The Cool Making one just screwed on perfectly w/o further modification. It comes with what is needed to mod the RC though.