Magpul MBUS 3 Rear Sight Black — Flip-Up Back-Up

Description

The Magpul MBUS 3 Rear Sight is a compact, flip-up back-up sight engineered for AR-platform rifles. Constructed from impact-resistant polymer, it offers a low-mass, durable option for a rear sight. The sight deploys with an ambidextrous push-button and provides a rapid-select aperture with windage adjustment. It is designed to sit at standard AR-height when deployed and mounts to a Picatinny rail.

Key Specifications

• The sight fits AR-10/AR-15/M4/M16/M110/SR-25 platforms.
• The rear assembly is made from impact-resistant polymer for reduced weight and durability.
• Deployment is via an ambidextrous push-button using spring-loaded technology.
• The rear sight features a rapid-select aperture system with windage adjustment.
• Windage adjustment per click is 0.5 MOA (14.5″ sight radius) and 0.4 MOA (20″ sight radius), depending on sight radius.
• The sight mounts to a Picatinny rail base configuration.
• The finished color is Black to match common AR-platform setups.
• The sight weighs approximately 30 grams with hardware.
• The MBUS 3 sits at standard AR-height when deployed for co-witnessing with optics.
• Manufactured in the USA.

Compact, lightweight, and purpose-built as a reliable back-up sight, the MBUS 3 Rear Sight balances low profile with quick deployment and user-friendly adjustment. Its polymer construction and rapid-select aperture make it a practical addition for shooters who want a durable, low-mass rear sight that integrates cleanly with Picatinny-mounted AR-platform rifles.