Designed for quick target acquisition in virtually any lighting, the XS® Sight Systems Flip-up Sights w/ CSAT & Tritium Stripe features a Samson aluminum body with steel bases for lasting durability and superior reliability. The CSAT A2 aperture rear sight and Tritium stripe front post deliver rapid target acquisition in low-light environments, while a white outline on the front post offers a high-contrast sight picture in bright light. Machined to military specifications, the durable 6061 T6 aluminum bases readily attach to any Mil-Std 1913 Picatinny rail. Plus, the flip-up design allows for rapid deployment when needed, while offering a low profile when folded down for a clear sight picture with magnified optics. Compatible with any rail-equipped AR-15/MSR-platform rifle or carbine.