Received my Glock G43 back from Jagerwerks a couple of days ago, about 4 weeks ahead of delivery forecast. I sent a very lightly used Holosun 407K to them along with the Glock in early July with instructions to mill the slide, install the Holosun, install BUIS, and refinish the slide in black nitride.
Workmanship is impeccable, BUIS co-witness and are very usable without being too tall, and I am quite pleased.
Got it sighted in today, using a mix of factory FMJ's, factory JHP's, and a hand load of Montana Gold JHP's (all 124 gr.)
Using an IDPA target, and shooting only at the head box at 15 measure yards, I alternated between shooting with the dot on and then turning it off and using the BUIS. Very consistent, and I think I will be comfortable using this pistol with the Holosun installed, and really like the fact that a transition to the BUIS works so well.
Full up with 6 +1 pf the aforementioned 124 gr. ammo, the package weighs 21.7 ounces. Will definitely be my NPE pistol going forward.