The Beretta PX4 is a high quality DA/SA hammer fired handgun. It is extremely reliable and with low recoil flip due to its rotating barrel lockup rather than the typical tilting barrel. Good as it is, Langdon Tactical offers a number of upgrades ranging from parts to complete pistols with custom triggers, safeties, and other goodies. Many of these upgrades are available as drop-in replacement parts.
I bought two of the minor upgrades, an 11# hammer spring and the Optimized Performance Trigger Bar.
Langdon sells a range of hammer spring weights. 11# is the second lightest, which they recommend for all ammunition. Their 10# unit is recommended for American factory ammunition only as some European ammo has harder primers.
The effect of the 11# spring was to lower the double action pull from 10 pounds to 8-1/2 pounds. The single action trigger pull went from 5-1/2 pounds to 5 pounds. Both were noticeable differences. The new spring has functioned flawlessly.
As a Langdon video shows, on new guns it helps to “burnish” the hammer/sear surfaces by dry firing the pistol a few times while pressing on the back of the hammer. On mine this dropped the double action pull from 10-1/2 to 10 pounds all by itself.
The new trigger bar improves the trigger reset from about 0.24 inches to 0.07 inches. This helps a lot with split times.
Earnest Langdon makes these installations look easy in the videos on the Langdon Tactical web site but if you decide to do this you will want to watch their “Trigger Job in a Bag” video several times. For both you will want to study exactly how the trigger bar fits into the hammer/sear assembly in your gun before you start. Alternately take it all to a gunsmith.
The spambots are getting out of hand : Please leave comments, friend, using the post in my comments category. 🙂