From my attempts, not really.
You'll have to sacrifice some. The more keys you remove, the less heavy it'll get. Going for a TKL, 75%, 65%, will be lighter and lighter.
Brown switches aren't the most "hardcore" feeling wise so you're in luck. Although a bit less good, I've felt that the feel from low profile browns aren't that much worse, so that's a way to increase portability. Oh course, you'll also lose in keycaps and switch choice by going low profile.
I've personally had a look at Numphy (example 75%, 500g) and keychron (same thing).
There are other brands and going to a 65% can probably shave off like 100g.