Glock's sixth generation is here. GLOCK announced Gen 6 in December 2025 and the pistols hit retail in January 2026, launching at SHOT Show in the G17, G19, and G45 — all 9mm. If you've built or bought parts for earlier Glocks, the first question is the practical one: does any of my Gen 3, 4, or 5 gear work on a Gen 6? The short answer — magazines, holsters, and ir …
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Buyers ask this exact question before every aftermarket Glock 19 slide purchase: Gen 3, Gen 4, or Gen 5 — what actually fits? The short answer is that Gen 3 slides fit Gen 1 through Gen 3 frames, Gen 4 slides fit Gen 4 frames, Gen 5 slides fit Gen 5 frames, and cross-generation swaps are possible but require the matching recoil spring assembly and sometimes a striker swap …
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Pick the wrong gas system length for your barrel and the rifle either short-strokes (won't cycle) or over-pressures (battering the bolt). This guide matches gas length to barrel length so you buy an upper and handguard that actually run together — no assembly walk-through, just what fits. The Four Gas System Lengths The "gas system length" is the distance from the chamber …
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