Troy Micro BattleSights feature a rugged low-profile design developed for firearms with top rails higher than the standard M4. These sights are ideal for shooters who prefer a sightline that is as close to the barrel as possible, or for those with raised top rail systems. Features: a When sights are folded, they lie paralell against the receiver reducing the chance to be damaged or broken. a Greatly enhances weapons such as the new IAR, the Sig Sauer 556A(R) Pistol and Carbine, POF 416A(R), FN ScarA(R), Robinson Armament XCRA(R), Heckler & Koch 416A(R) & 417A(R) and other weapons with raised top rails. a Sold as a set only.