A handgun is a compact, handheld firearm designed for one-handed operation, commonly used for self-defense, sport shooting, and law enforcement. Handguns work with a variety of parts, including barrels, slides, frames, triggers, magazines, sights, grips, firing pins, and springs. Popular models include semi-automatic pistols and revolvers. Many aftermarket and OEM components are available, allowing shooters and builders to customize or repair their handguns for optimal performance and personal preference.
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