It seems the Vlocity Jr is the lightest hopper on the market at the moment
If you really care about shaving off those grams
These are the stock weights for comparison.
Vlocity Jr.
385 grams = 13.5804 ounces without batteries
469 grams = 16.5434 ounces with batteries (2 9v)
VLocity
415 grams = 14.6386 ounces without batteries
507 grams = 17.8838 ounces with batteries(2 9v)
Halo B/Reloader B
547 grams = 19.2948 ounces without batteries
694 grams = 24.4801 ounces with batteries (6 AA)
630 grams = 22.2225 ounces with 9 volt mod (2 9v)
Halo B with Hybrid shell
568 grams = 20.0356 ounces without batteries.
713 grams = 25.1503 ounces with batteries. (6 AA)
650 grams = 22.9280 ounces with 9 volt mod (2 9v)
Pulse
582 grams = 20.5294 ounces without batteries
738 grams = 26.0321 ounces with batteries (6 AA)