New Magpul GEN 2 PTS Front and Rear Sights (Flat Dark Earth) Spring loaded flip-up design, release lever can be reached on left, right & top position. Suitable for all M4/M16 & AR-Series with standard 20mm RIS/RAS rail. **Generally used for airsoft and training purposes** ***Not recommended for self defense*** For 20mm wide picatinny rails.