This is an excellent tool for the removal and installation of fixed sights for your Beretta PX4. The only prep work I did before installing the new sights was, as becker recommended, sand the base of the replacement Beretta adjustable sights. I would have given the tool a five-star rating, but I found that the included literature did not address the Beretta PX4 adequately. Contrary to JC's review, this tool DOES work with the PX4, however, one must completely disassemble the adjustable sights (that is, remove all of the adjusting screws from the sight) so that the slide can escape the tool once installation is completed. Now I can finally shoot straight.
This is a very sturdy tool but it requires help removing the sights on a PX4. It works for the front and rear sight. Once you apply pressure and the sights don't want to budge tap lightly on the turn screw with a brass hammer and retighten and tap again. You can walk the sights out that way. To istall the beretta adjustable sight you can reverse the process. First I would suggest you run the bottom of the sight dovetail on 400grit paper and remove a .001 to .002". Also you will fine the storm had the sights peened from inside the slide. Take a small file and flatten the bumps out. Go carefully. The rear adjustable sight can be installed by removing the elevation screw and tilting the sight up to allow the tool to work.Be carefull not to lose the two coil elevation springs or the detent ball that contacts the elevation screw. Before you start read the directions that came with the tool and be sure your sights are started from the right direction.
The tool is a great item, built extremly well and sturdy. This is a must have to break loose the factory sights on a PX4 and then adjustment them. I never had a problem with the tool maring the sights and it is extremly easy to work. The "only" negative with this tool is that you can not use it to install the new adjustable Beretta rear sights on the PX4. (All other types not a problem) Once the sight is installed the tool can not be removed from the slide due to the fact the sight is wider then the tool opening. However I still give this item 5 stars.
Beretta1526 (Admin, Beretta Forum)
As mentioned in my review for the 92/96/98/M9 version of this sight pusher, this is a very solid tool that works without using a vice or other tools. Its design keeps you from marring or damaging your slide when replacing or adjusting your rear sight.