Short answer: slides and recoil springs are generation-locked, barrels mostly swap between Gen 3 and Gen 4 (Gen 5 is its own platform), and magazines run across all three. The chart below covers every major 9mm part for the Glock 17, Glock 19, and Glock 26 across Gen 3, Gen 4, and Gen 5 — so you know exactly what fits before you order. Get the slide and frame generation right a …
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Yes — you can change the slide on a Glock at home, no gunsmith required. The slide comes off the same way it does for a normal field strip: clear the gun, rotate the takedown lever, slide it forward off the rails. The catch is compatibility: a Gen 3 slide does not fit a Gen 4 frame, a Glock 19 slide does not fit a Glock 17 frame, and a Glock 23 slide is .40 S&W — not interchang …
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