Rapidly mount or detach your ECHO SV thermal sight while maintaining consistent return-to-zero alignment; Bobro-Style Lever System locks firmly yet releases easily under tension; Durable and non-reflective for stealth and long-term corrosion resistance; Specifically engineered to fit all Sig Sauer ECHO SV models equipped with the corresponding dovetail footprint; Streamlined design retains thermal optic ergonomics without adding bulk; Marked with model number and UPC for reliable part matching and replacement