JG Full Metal Flip Up Rear Sight

S-System style rear flip up sight. Fits standard weaver/picatinny rails. Metal construction. Features: Low-profile design conserves rail space Fits 20mm Picatinny rails Spring-loaded flip-up rear sight activated by a push button Securely locks in the raised position Durable full metal construction in black Allows for optics use as needed Aids in rapid target acquisition at close to mid-range Windage and elevation fully adjustable