An adjustable firearm sight includes a body made of a flexible and resilient material. The body includes an elevation arm connected to the body and extending proximally therefrom to a sight portion, where the elevation arm and the body comprise a monolithic structure. A cam body below the elevation arm has a cam surface in contact with a bottom surface of the elevation arm, where the cam body is rotatable to change a vertical position of the sight portion. Also disclosed is a front sight assembly where a sight element is disposed in a longitudinal bore through a sight body. A proximal end of the longitudinal bore has a reduced size. At a distal end, a retention pin is disposed in a retention bore that extends transversely to and intersects the longitudinal bore such that the retention pin occupies the longitudinal bore to retain the sight element.