Magpul MBUS Gen 2 Rear Flip-Up Sight AR-15/M16 Black Polymer

Magpul MBUS Gen 2 Rear Sight is a rugged, spring-loaded back-up sight designed for AR-15/M16 platforms and other firearms equipped with a 1913 Picatinny rail. Built from high-strength polymer, it deploys instantly from either side and locks positively into place. Protective wings shield the dual, same-plane apertures, and the windage knob provides tool-free adjustments. Engineered to withstand hard use, the sight stays put under recoil yet folds flat if impacted. Made in the USA.\n\nProduct Highlights\n- Flip-up rear sight with ambidextrous deployment\n- Dual, same-plane apertures protected by robust wings\n- Tool-free windage adjustment via positive-click detent knob\n- Durable, lightweight polymer construction built to resist abuse\n- Compatible with most 1913 Picatinny receiver rails; tailored for AR-15/M16