Halve the kiwis crosswise. (Slice a bit off the bottom so the fruit will stand.) Scoop out the flesh, leaving a 1/4-inch border; cover and refrigerate the halves. Place the kiwi flesh in a bowl; mash with the sorbet and tequila. Cover; freeze for 5 hours.
Fifteen minutes before serving, put the kiwi halves in the freezer.
Top the kiwi halves with scoops of sorbet. Sprinkle with salt. Serve immediately.