Samson manual folding sights are engineered to withstand significant impact while maintaining target accuracy, making them the most durable combat sights available. These sights are compatible with all aftermarket rear aperture replacements that adhere to mil-spec dimensions. Each sight securely locks in the deployed position. Please note that these sights are not designed for use with lower height gas block rails. The robust construction and reliable mounting system ensure consistent zero retention. The standard dual aperture system features two adjustable openings that allow for precise control of light exposure, enhancing image quality in varying conditions Compatible with and securely mounts onto any standard 1913 picatinny rail system, ensuring a stable and reliable attachment for various applications The M4 co-witness height is precisely calibrated to ensure optimal alignment between the iron sights and the optical sight, providing seamless target acquisition A corrosion-resistant stainless steel clamp designed for secure fastening, offering durability and reliability in various industrial and mechanical applications The windage adjustment mechanism allows for precise modifications, offering just over 0.5 MOA per click for enhanced accuracy High-accuracy laser engraving technology enables detailed and precise etching on various materials, ensuring exceptional quality and intricate designs