I got one of these new magazines for my birthday. I also have a Glock 19, so I did a comparison.
I used 147 grain 9mm JHP to keep the weight of the ammo the same. Sixteen rounds (15+1).
Weight of ammo.................7.8 oz.
Glock 43x
Unloaded weight................16.7 oz.
Loaded weight....................26.5 oz.
Glock 19 (Gen-4)
Unloaded weight...............21.02 oz.
Loaded weight..................30.9 oz.
Glock 43x/48 15 round magazine
Unloaded......................2.1 oz.
Loaded.........................9.4 oz.
Glock 19 15 round factory magazine
Unloaded......................2.3 oz.
Loaded.........................9.7 oz.
I used 147 grain 9mm JHP to keep the weight of the ammo the same. Sixteen rounds (15+1).
Weight of ammo.................7.8 oz.
Glock 43x
Unloaded weight................16.7 oz.
Loaded weight....................26.5 oz.
Glock 19 (Gen-4)
Unloaded weight...............21.02 oz.
Loaded weight..................30.9 oz.
Glock 43x/48 15 round magazine
Unloaded......................2.1 oz.
Loaded.........................9.4 oz.
Glock 19 15 round factory magazine
Unloaded......................2.3 oz.
Loaded.........................9.7 oz.