Samson manual folding sights are engineered to withstand significant impact while maintaining target accuracy. These sights are among the most durable combat sights available in the market. They are compatible with all aftermarket front sight post 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. 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