Usually, the first modification to a Glock is to remove the factory sights. Coincidentally, the Gen 4 Glock 35 received for this article arrived the same day a box from 10-8 Performance showed up. That box contained a set of 10-8’s excellent Glock sights, which feature a U-shaped rear notch and a fiber-optic front sight. With the new sights installed, the sight picture on the Glock 35 is crisp and clean. The wide U-shaped notch of the rear sight allows plenty of light around the front sight post. The fiber-optic rod on the front post gathers light, aiding the eye in the task of quickly acquiring the front sight to break a shot. Many shooters are happy once they upgrade the sights, but for those who want more there are nearly endless Glock modifications.
Proceeding in a logical manner, the next set of modifications is to the trigger pull. The Glock 35 comes from the factory with what measured out to about a 4.5-pound trigger. In models such as the 17 and 22, it is very common to replace the stock trigger connector bar with a 3.5-pound connector; however the Glock 35 already has Glock’s version of that lightened connector. Even so, Lone Wolf and Glockworx both make aftermarket 3.5-pound connectors, which will smooth and improve the Glock 35’s trigger pull. Adding an aftermarket connector is step one in lightening and smoothing the trigger pull.
Step two is to replace the firing pin/striker spring with a lighter weight spring. Because the Glock’s safe-action trigger mechanism only partially cocks the striker when the gun cycles, pulling the trigger to the rear completes the action of compressing the striker spring before it is released. Changing to a lighter striker spring will lower the weight of the trigger pull. With an aftermarket 3.5-pound connector and a 4-pound striker spring, the Glock 35 now has a trigger pull less than 3.5 pounds. Unfortunately, reducing the weight of the striker spring means that the firing pin itself has less velocity when it is driven forward. This can lead to light primer hits, an undesirable outcome in the middle of a match.
Firing pin velocity can be increased slightly by replacing the factory part with one that is skeletonized and, therefore, lighter in weight. Multiple companies make lightweight firing pins for Glocks. Some use titanium, and others use steel with circular lightening cuts in the body. Either method has the same result—restoring reliable ignition. With that in mind, however, the minute that the firing pin and spring are modified, the Glock 35 becomes a competition-only gun. It is not suitable for personal protection with the trigger pull hovering around 3 pounds. It is also advisable to try and stick with ammunition that employs softer primers once the trigger modifications are complete. Federal primers will give your race-Glock the best chance for reliable ignition.