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Gen 3, Gen 4 and Gen 5 GLOCK pistols look almost the same from a distance, but enough changed inside that a part listed only for "G19" can be the wrong part for your G19. This guide covers how to tell the generations apart, what carries across, what does not, and how to confirm fit before you order. How to identify your generation Gen 3 Gen 3 frames have finger grooves on the front of the grip, a thumb rest on the grip panels and an accessory rail on the dust cover. The grip has no interchange …

Before you buy a muzzle brake, flash hider, thread protector or adapter, you need to know two things about your barrel: its thread pitch and its caliber. This reference covers the thread pitches most often found on rifles and pistols sold in the US, how to read the notation, and how to check your own barrel. How to read thread pitch Muzzle threads are written as a diameter and a pitch. Imperial (inch) threads are written as outside diameter in inches by threads per inch (TPI). 1/2x28 means a 1 …

The guide rod and recoil spring are the parts that return a GLOCK slide to battery after every shot. They are inexpensive, they wear out, and they vary by model and generation more than most owners realize. This guide covers the factory designs, common aftermarket materials, what spring weight means, and how to choose the right assembly for your pistol. What the recoil spring assembly does When a round is fired, the slide moves rearward and compresses the recoil spring. The spring then drives t …

The GLOCK 43, 43X and 48 are all 9mm "Slimline" pistols, and they share more parts than most owners expect. They are not identical, though. A few frame-side parts changed when GLOCK widened the grip for the 43X and 48, and those are the parts that cause most ordering mistakes. This guide covers what is the same, what is different, and how to confirm fit before you buy. The three pistols at a glance GLOCK's published specifications show where the models line up and where they split: G43: 6-roun …