TROY Micro Sight Sets provide the ideal solutions for shooters who favor a sightline that is as close to the barrel as possible, or for those with raised top rail systems. The Micro Sights greatly enhance weapons with raised top rails. The Micro Sights are rugged, reliable and battle ready. This Micro Set model has an HK-style front with the standard round rear. Requires front sight tool. Standard M16 A2 front sight.