Installing the adjustable sights was a freakin' pain.
Beretta must install their sights with a billion ton press or something. They are just stupid tough to remove. I would not have been able to remove them without the Fisher Soultions sight pusher, and even with it, the amount of pressure needed with the wrench was rediculous. Fitting the adjustable sights was also time consuming, start to finish was 2.5 hours measured in sweaty fits of profanity.
I would recommend that if you are not 100% confident with working on your guns that you not try to remove the sights on your PX4. The Fisher Soultions sight pusher worked well, but was very fussy to use. The tapered slide required shimming and the usage of blocks. You will have an easier time if you remove the safety, which I didn't do. I'm not overly happy with the quality of the front sight, more on that below.
Here's the stuff you will need. Be prepared to make some shims. You will mark up your slide removing the sights, there is no way around it with the finish on the PX4. If you give the PX4 a dirty look you will scuff the slide, so I wasn't really surprised.
Rear sight removed. Not sure what the two dimples are for.
Front sight removed. Look at the mess of metal in the sight channel. I really don't understand why all that is necessary, other than to make the front sight hold up to a 50 megaton nuclear blast or something.
Sights installed. It took a bunch of fitting and a ton of fussing with the Fisher tool to get it just right. Note the gap in the front sight. That was good for a stream of profanity.
The rear sight seems well made. I had to remove the elevation screw and pull the sight leaf up to install it. I used cold blue to clean up the dings on the sights made from the Fisher tool. I wish I could do the same to the slide.
I painted the front dot and blacked out the rear dots with a Sharpie. If you look closely you will see that the front sight post is slight crooked (which I fully admit caused more profanity). It's not too bad, but considering the price of the sights I would have liked to see better QC. I guess it's possible that the dovetail is out of spec, but the OEM sight was fine, so I tend to blame the sight. I don't mind the sight picture and the rear notch doesn't bother me as much as I thought it would.