The Samson Manufacturing QFFFSA2 is a robust manual folding sight designed for combat scenarios. These sights are fully compatible with all aftermarket front sight post replacements conforming to Mil-Spec dimensions. For optimal utility, all sights are designed to lock in the deployed position.It\'s important to note that these sights are not intended for use with lower height gas block rails. They are perfectly crafted for (M4) co-witness height, offering excellent sighting precision.The sights can be easily attached to any 1913 Picatinny rail and include a durable, stainless steel clamp for secure attachment.