The Troy Industries AR-15 BattleSight Set Micro Flip Up Tritium Sights are low-profile designed for firearms with top rails higher than the standard M4. For shooters who favor a sightline that's as close to the barrel as possible, or for those with raised top rail systems, the Troy Micro BattleSight provides an ideal solution. The Troy Micro BattleSight greatly enhances weapons such as the new IAR, the Sig Sauer 556 Pistol and Carbine, POF 416 and 417, FN Scar, Robinson Armament XCR, HK 416 and 417 and other weapons with raised top rails. Troy Micro BattleSights are rugged, reliable and Battle Ready. Sold as a set only. Made in the U.S.A.