Fits double-stack Glock-pattern pistols in 9mm, .40 S&W, and .357 across generations. Ready to install out of the box with a simple, no-gunsmith installation. Uses the pistol's factory sights-no sight calibration required-and is compatible with compensators and red-dot optics. No permanent modifications or disassembly needed. Ergonomic UCH charging surface improves manipulation (charging can also be done via an optic), and the lightweight, glass-reinforced polymer construction keeps weight down. Modular design accepts optional Picatinny adapters, remains fully functional with a folded arm brace, and maintains compatibility with many factory holsters and licensed airgun/airsoft replicas. Verify model compatibility before purchase.