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093674813441
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093674813441
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Magpul MBUS 3 Flip-Up Rear Sight - Black Polymer Construction

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The Magpul MBUS 3 Flip-Up Rear Sight delivers reliable backup sighting capabilities with enhanced durability and streamlined profile. This third-generation sight incorporates lessons learned from military and law enforcement feedback to provide shooters with a dependable aiming solution when primary optics fail.

What Makes This Different

The MBUS 3 features a redesigned spring mechanism that eliminates the weak points found in earlier flip-up sight designs. The sight body uses reinforced polymer construction that maintains zero under repeated deployments while reducing overall weight by 15% compared to metal alternatives. The low-profile design sits flush when folded, preventing snag points during weapon manipulation.

Key Features

  • Spring-loaded flip-up mechanism with positive lock engagement
  • Dual aperture system with 0-200 meter and 300+ meter settings
  • Fits standard MIL-STD-1913 Picatinny rail systems
  • Impact-resistant polymer construction rated for -40°F to 140°F
  • Tool-free windage adjustment with detent clicks
  • Ambidextrous activation button for left and right-handed shooters
  • Black finish resists wear and maintains low visibility profile
Field testing demonstrates consistent performance across temperature extremes and environmental conditions. The sight maintains zero through thousands of deployment cycles, making it suitable for competitive shooting, patrol duty, and home defense applications. The polymer construction resists corrosion in maritime environments while the dual aperture system accommodates various engagement distances without tool adjustments.

Technical Specs

  • Overall length: 1.6 inches when folded, 2.2 inches deployed
  • Weight: 1.2 ounces
  • Material: Reinforced polymer construction
  • Mounting: MIL-STD-1913 Picatinny rail compatible
  • Aperture settings: 0-200m and 300+ meter options
  • Temperature range: -40°F to 140°F operational
  • Country of origin: USA
  • Warranty: Manufacturer limited warranty included
This sight system provides the reliability professionals demand when backup sighting becomes critical. The proven design eliminates common failure points while maintaining the quick deployment speed required in dynamic situations.