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Hi Efren and welcome. This model has the Modular Optics System (MOS). It will require an Optics plate in most cases. https://us.glock.com/en/learn/glock-pistols/mos#:~:text=The%20Slimline%20MOS%20pistol%20models,do%20not%20need%20Adapter%20Plates.&text=GLOCK%20pistol%20models%20in%20standard,Holosun%C2%AE%20(except%20509).