I am still on the fence after today spening about 2 hour withh a friend at the range with his Glock 43. My impressions are as follows: 43 v/s 19 as follows: 43 is thinner. 43 hand grip is thinner, and shorter. 43 over all is a tad shorter. 43 & 19 both shot about the same by me at 5, 10, and 25 yeads. But at 25 yards the 19 was tighter. I honestly like my Gen 3 19 feel in hand better than the 43 that to me is more abrasive. May still pickup at Blue 43, but honestly I am in no hurry. All this ws with 115 GR FMJ Winchester Value packs.