Magpul MBUS 3 Back-Up Rear Sight

The Magpul MBUS 3 Back-Up Rear Sight features a rapid-select rear aperture system, offering two windage-adjustable apertures for versatile aiming options across various shooting conditions.

This back-up sight deploys easily with an ambidextrous push-button mechanism, allowing rapid transition from optic to iron sights when needed. Spring-loaded construction ensures reliable flip-up operation.

Designed for durability and lightweight performance, the MBUS 3 is constructed from polymer and mounts securely to Picatinny rails. Tool-less windage adjustment enables quick zero corrections in the field.

• Fits M1913 Picatinny rails
• Rapid-select dual-aperture system (0.5 MOA / 0.4 MOA)
• Ambidextrous push-button deployment
• Tool-less windage adjustment
• Polymer construction
• Designed for AR-15/M4/M16 platforms