Glock .40 S&W refers to Glock pistols chambered in .40 Smith & Wesson, such as the G22 (full-size), G23 (compact), and G27 (subcompact). Known for duty reliability and strong terminal performance. Works with model/Gen-specific parts: .40 S&W slides, barrels (standard or threaded, often 9/16×24), recoil spring assemblies, frames, trigger kits/connectors, pins/springs, sights, and .40 magazines. Compatible accessories include weapon lights, optics (MOS/plate systems), compensators, and suppressors using a threaded barrel with the correct piston/booster. 9mm conversion barrels/mags possible on some models.
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