magpul mbus rear sight instructions
Learn how to install and adjust your Magpul MBUS rear sight with our easy-to-follow guide. Perfect for AR-15 setups!
The Magpul MBUS Rear Sight is a lightweight, durable, and reliable backup sight designed for AR-15/M16 platforms. Made from high-strength polymer, it offers a compact and rugged design. Its dual aperture feature provides two sighting options, while the spring-loaded deployment ensures quick and easy use. Compatible with Picatinny rails, it is an excellent choice for shooters seeking a cost-effective and efficient sighting solution.
1.1 Overview of the MBUS Rear Sight
The Magpul MBUS Rear Sight is a lightweight, polymer-based backup sight designed for AR-15/M16 platforms. It features a spring-loaded flip-up design, allowing quick deployment and stowage. The sight includes a dual aperture system, offering shooters the choice between a larger aperture for close-range targets and a smaller one for precision shooting. Compatible with Picatinny rails, it is built for durability and reliability in various environments. Its compact design ensures minimal interference with primary optics while providing a robust secondary sighting solution. The MBUS Rear Sight is a popular choice for its affordability, ease of use, and proven performance.
1.2 Key Features of the MBUS Rear Sight
The MBUS Rear Sight is constructed from high-strength, impact-resistant polymer, ensuring durability in harsh environments. It features a spring-loaded flip-up design for rapid deployment and stowage. The dual aperture system provides two sighting options: a large aperture for close-range targets and a smaller one for precision shooting. The sight is compatible with Picatinny rail systems and is tailored for AR-15/M16 platforms. Its lightweight design minimizes weight addition while maintaining reliability. The MBUS Rear Sight also offers windage adjustment capabilities, allowing shooters to fine-tune their aim for accuracy. These features make it a versatile and practical choice for both tactical and recreational use.
Deployment and Stowage of the MBUS Rear Sight
To deploy the MBUS Rear Sight, press the Release Latch on the top of the base. For stowage, push the Sight Arm down into its flat, locked position.
2.1 Deploying the Sight
To deploy the MBUS Rear Sight, press the Release Latch located on the top of the base. This action releases the spring-loaded Sight Arm, allowing it to flip up into the upright position. The sight will lock securely in place, ensuring stability for accurate targeting. For easier deployment, users can also utilize the serrated side extensions on the latch. Once deployed, the dual aperture feature provides two sighting options: a small aperture for precision shooting and a large aperture for rapid targeting. Ensure the sight is fully extended and locked before use for optimal performance.
2.2 Stowing the Sight
To stow the MBUS Rear Sight, push the Sight Arm downward into its flat, folded position. Ensure the arm is fully collapsed and locked to prevent accidental deployment. This compact design allows the sight to lie flat against the rail, minimizing interference with other accessories. For manual override, press the Sight Arm down until it clicks into place. Always verify the sight is securely stowed before storing or transporting the weapon. Proper stowage protects the sight from damage and ensures smooth operation when needed. Regularly check the Sight Arm’s alignment with the rail to maintain optimal functionality.
Installation of the MBUS Rear Sight
To install, loosen the 10-24 Dual-Drive Screw using a 1/8 hex key or flathead screwdriver. Position the sight on the Picatinny rail, ensuring proper alignment. Tighten the screw securely to hold the sight in place.
3.1 Positioning the Sight on the Rail
Position the MBUS Rear Sight on the Picatinny rail, ensuring the base aligns with the rail slots. Flip the sight up for installation; Use the serrated side extensions to guide it into place. Ensure the sight is centered and evenly spaced. Proper alignment ensures optimal performance and durability. Always refer to Magpul’s guidelines for precise placement. This step is crucial for accurate sight functionality. Take care to avoid misalignment to maintain zero. Use the release latch to secure the sight temporarily before tightening. This ensures a stable and secure fit. Proper positioning is key to reliable operation.
3.2 Tightening the Sight on the Rail
To secure the MBUS Rear Sight, use a 1/8 hex key or flat head screwdriver to tighten the 10-24 Dual-Drive Screw. Ensure the sight is properly aligned on the rail. Tighten firmly but avoid over-tightening to prevent damage. Flip the sight up and check alignment. Make sure the sight arm locks securely in the stowed position. Proper tightening ensures stability and prevents shifting during use. Follow Magpul’s torque specifications for optimal performance. Double-check the sight’s position and alignment before final tightening. This ensures reliable operation and maintains zero. Always verify the sight is securely fastened to the rail.
Adjusting the MBUS Rear Sight
The MBUS Rear Sight offers easy windage and elevation adjustments for precise accuracy. Use the Windage Adjustment Knob for left-right alignment and the provided tool for elevation.
4.1 Windage Adjustment
The MBUS Rear Sight allows for precise windage adjustments to align your shot accurately. Locate the Windage Adjustment Knob on the right side of the sight. Turn the knob clockwise to move the point of impact to the right or counterclockwise to move it to the left. This adjustment ensures proper alignment with your front sight, compensating for wind or target movement. Use a 1/8 hex key or flathead screwdriver if additional torque is needed. Make small adjustments and test your aim to achieve the desired accuracy. Proper windage alignment is crucial for consistent shooting performance.
4.2 Elevation Adjustment
The MBUS Rear Sight allows for elevation adjustments to fine-tune your aim. Flip the sight to switch between the large and small aperture for different shooting distances. The dual aperture design provides quick targeting options. To adjust elevation, align the rear sight with the front sight post and ensure the sights are level. Use the Windage Adjustment Knob to dial in your point of impact if needed. For precise zeroing, shoot a group, then adjust the sight to match your desired impact point. Test at various distances to confirm accuracy and make further adjustments as necessary for consistent performance.
Using the Dual Aperture Feature
The MBUS Rear Sight features a dual aperture system, offering two sighting options. Use the large aperture for close-range, rapid targeting and the small aperture for precision at longer distances.
5.1 Switching Between Apertures
The MBUS Rear Sight features a dual aperture system, allowing shooters to toggle between two sighting options. To switch between apertures, simply rotate the sight drum. The large aperture is designed for close-quarters shooting, providing a rapid target acquisition capability. The small aperture is better suited for precision shooting at longer distances, offering a finer sight picture. This versatility makes the MBUS Rear Sight adaptable to various combat scenarios, ensuring optimal performance in both near and far engagements. The intuitive design enables quick transitions, making it a practical choice for tactical and competitive shooters alike. No tools are required for aperture switching.
5.2 Zeroing the Sight for Accuracy
To zero the MBUS Rear Sight, start by ensuring it is properly installed and tightened on the Picatinny rail. Begin by firing a few rounds at a target to determine the bullet impact. Adjust the windage by turning the Windage Adjustment Knob clockwise for rightward movement or counterclockwise for leftward movement. For elevation, turn the Elevation Adjustment Knob upward or downward as needed. After each adjustment, fire additional rounds to verify the new impact. Repeat the process until the point of aim aligns with the point of impact. Ensure both apertures are zeroed separately for optimal accuracy at varying distances.
Maintenance and Care
Regularly clean the MBUS Rear Sight with a soft cloth to remove dirt or debris. Inspect for damage or wear, especially the apertures and springs. Avoid harsh chemicals or abrasive materials that could damage the polymer. Store the sight in a dry place when not in use to prevent rust or corrosion. Proper maintenance ensures optimal performance and longevity of the sight.
6.1 Cleaning the Sight
To clean the MBUS Rear Sight, use a soft, dry cloth to wipe away dirt, grime, or residue. For stubborn debris, lightly dampen the cloth with water. Avoid using harsh chemicals or abrasive materials, as they may damage the polymer or metal components. Focus on the apertures, springs, and release latch to ensure smooth operation. After cleaning, inspect the sight for any remaining debris. Allow the sight to air dry before reuse. Regular cleaning prevents malfunctions and maintains accuracy. Always handle the sight with care to preserve its functionality. Proper cleaning ensures reliable performance in all conditions.
6.2 Inspecting for Damage or Wear
Regularly inspect the MBUS Rear Sight for damage or wear. Check the apertures for obstructions or deformation. Examine the springs for tension loss or corrosion. Inspect the release latch and sight arm for smooth operation and any visible damage. Look for cracks or excessive wear on the polymer components. Ensure the sight base is secure and free from damage. If any damage is found, replace the sight immediately. Proper inspection ensures reliability and accuracy. Regular checks prevent potential issues during use. Always verify the sight’s condition before handling or firing your weapon. This ensures optimal performance and safety.
Troubleshooting Common Issues
Common issues include sight not locking, adjustments not holding zero, or aperture obstructions. Check for dirt, tighten screws, or replace worn parts as needed.
7.1 Sight Not Locking Properly
If the MBUS Rear Sight fails to lock securely, inspect for dirt or debris obstructing the latch mechanism. Clean the area thoroughly with a soft brush or cloth; Ensure the Sight Arm is fully depressed into its stowed position. If issues persist, check for worn or damaged springs and replace them if necessary. Additionally, verify that the sight is properly tightened to the rail using a 1/8 hex key. Regular maintenance and inspection can prevent locking problems and ensure reliable operation. Always refer to the manufacturer’s guidelines for specific troubleshooting steps.
7.2 Adjustments Not Holding Zero
If the MBUS Rear Sight adjustments are not holding zero, ensure the Windage Adjustment Knob is securely tightened after sighting in. Check for loose screws or debris in the adjustment mechanism. Clean the area with a soft brush or cloth to remove any obstructions. Verify that the sight is properly seated on the rail and tightened evenly. If issues persist, inspect the springs and adjustment knobs for wear or damage and replace them if necessary. Resetting the sight to its factory position may also resolve the issue. Regular maintenance and inspection can help maintain accuracy and reliability.
The Magpul MBUS Rear Sight is a durable and reliable accessory for AR-15/M16 platforms, offering quick deployment and easy adjustments. Regular maintenance ensures optimal performance and accuracy, making it a trusted choice for shooters.
8.1 Final Tips for Effective Use
To maximize the performance of your Magpul MBUS Rear Sight, ensure regular maintenance and proper adjustments. Always clean the sight after use to prevent debris buildup. Store the sight in its stowed position when not in use to avoid accidental damage. Practice deploying and adjusting the sight to build muscle memory. For optimal accuracy, zero the sight at your preferred distance, considering the distance between front and rear sights. Avoid over-tightening the mounting screw to prevent damage to the rail or sight. Lastly, inspect the sight regularly for wear or damage to ensure reliability in critical situations.