Gathering Your Tools and Materials
In the world of firearms, preparedness is paramount. Whether for self-defense, competitive shooting, or tactical applications, having a reliable and functional firearm is just the beginning. A critical component of this readiness is the ability to accurately aim and engage targets. This is where iron sights, and specifically, the Magpul Back-Up Sight (MBUS) flip-up sights, come into play. This guide delves into the intricacies of the MBUS Flip Up Sight Install, offering a detailed, step-by-step approach to ensure a successful and secure mounting of these essential accessories. Iron sights provide a dependable backup solution when your primary optics, such as a red dot sight or scope, encounter issues like battery failure or damage. They offer a familiar aiming method, allowing for quick target acquisition even in challenging conditions. The MBUS system provides a low-profile design that remains unobtrusive until needed. Its ability to quickly deploy and lock into place makes it ideal for situations where time is of the essence. This guide will equip you with the knowledge and skills needed to complete the MBUS Flip Up Sight Install with confidence.
Before embarking on any firearm-related project, it’s essential to gather all the necessary tools and materials. A well-prepared workspace contributes to a smoother and safer process. For the MBUS Flip Up Sight Install, you’ll need the following:
MBUS Front Sight
The front sight is crucial for aligning your sights. Ensure you have the correct model for your firearm. Magpul offers various versions for different rail systems.
MBUS Rear Sight
This sight works in conjunction with the front sight. It is equally important for aiming.
Suitable Screwdriver or Tool
Depending on your rifle’s rail system and the MBUS sights, you will likely need a flathead screwdriver or an appropriate tool to tighten the mounting screws. Some rifles may require a specific type of tool.
Torque Wrench (Recommended)
While not mandatory, a torque wrench is highly recommended for precise tightening of the screws. This helps to prevent over-tightening (which can damage the sight or rail) or under-tightening (which can lead to the sight coming loose during use).
Thread Locker (Optional, but recommended)
A small amount of thread locker, like Loctite, can prevent the screws from loosening due to vibration. This is particularly useful for firearms that experience significant recoil.
Your Rifle or Platform
This could be an AR-15, a similar platform, or any firearm equipped with a Picatinny rail system. Confirm your platform is compatible with the MBUS sights.
Safety Glasses
Eye protection is non-negotiable when working with firearms.
You can generally purchase MBUS sights, along with other accessories, from reputable firearms retailers, online gun stores, and the Magpul website. Always verify the product’s authenticity when buying from third-party sellers.
Safety First: A Critical Note
Before we begin, prioritize safety. Your safety and the safety of those around you is paramount.
Unload Your Firearm
Before any work, ensure the firearm is completely unloaded. Visually inspect the chamber and magazine well to confirm the absence of ammunition. Cycle the action several times to be certain.
Point in a Safe Direction
Always point the muzzle in a safe direction, away from yourself and others.
Eye Protection
Always wear safety glasses throughout the entire process to protect your eyes.
Work in a Clean and Well-Lit Area
A clean, well-lit workspace will minimize the risk of accidents.
Preparing Your Rifle for Installation
Before the MBUS Flip Up Sight Install, proper preparation is crucial for a successful and secure fit. Take the time to follow these steps:
Begin by thoroughly inspecting the upper receiver and handguard or rail system of your rifle. Check for any obstructions, debris, or damage that might interfere with the mounting of the sights. Ensure the Picatinny rails are free of any obstructions.
Next, give the rails a good cleaning. A simple wipe-down with a cleaning solution, such as isopropyl alcohol, and a clean cloth is usually sufficient to remove any oil, grease, or residue. This improves the friction between the sights and the rail, promoting a more secure fit. Proper rail cleaning plays a role in a successful MBUS Flip Up Sight Install.
Carefully consider the placement of any other accessories you may have on your rifle, such as optics, flashlights, laser sights, or vertical grips. Ensure there is sufficient clearance for the flip-up sights to deploy fully and function properly without obstruction. It’s generally recommended to mount the flip-up sights as far apart as possible to maximize sight radius, which can improve accuracy.
Installing the Front Sight
Now for the actual MBUS Flip Up Sight Install, starting with the front sight. Follow these steps:
Locate the front sight
The MBUS front sight is designed to be mounted on the forend of your firearm, near the muzzle.
Identify the correct placement
In general, the front sight is positioned at the end of the handguard or rail system, closest to the muzzle. Ensure you have enough room to deploy the sight. Position it so the mounting mechanism will attach properly and will not be obstructed. A correct orientation is crucial to your MBUS Flip Up Sight Install.
Mounting the front sight
Carefully align the MBUS front sight with the Picatinny rail. Insert the sight onto the rail, ensuring it is straight and properly aligned.
Tighten the securing screw(s)
Using the appropriate tool (usually a flathead screwdriver), carefully tighten the screw(s) that secure the sight to the rail. If you have a torque wrench, tighten the screws to the manufacturer’s recommended torque specifications. This will ensure the sight is securely mounted without stripping the threads.
Optional application of thread locker
If you are using thread locker, apply a small drop to the screw threads before tightening.
Installing the Rear Sight
Next, we proceed to the installation of the rear sight. This follows a similar procedure to the front sight:
Identify the rear sight
The MBUS rear sight typically mounts on the upper receiver of the rifle.
Find the correct placement
The rear sight is usually mounted as far back on the upper receiver as possible. This maximizes the sight radius. The MBUS Flip Up Sight Install benefits from this optimal placement.
Mounting the rear sight
Align the MBUS rear sight with the Picatinny rail on the upper receiver. Insert the sight onto the rail.
Tighten the securing screw(s)
Using the appropriate tool, tighten the securing screw(s) securely. If you have a torque wrench, follow the manufacturer’s recommendations.
Optional application of thread locker
Apply thread locker to the screw threads if desired, following the instructions on the thread locker packaging.
Zeroing Your Sights: Achieving Accuracy
The MBUS Flip Up Sight Install is not complete until you’ve zeroed your sights. Zeroing is the process of adjusting your sights so that the point of impact of your bullets aligns with your point of aim. This step is essential for accuracy.
First, determine the desired zeroing range. A common zeroing distance for an AR-15, for instance, is often either twenty-five or fifty yards. This will depend on your shooting style and intended use.
Next, set up a target at the chosen range. Ensure the target is clear and provides a distinct aiming point.
Position yourself at the firing line and acquire a good sight picture, using your MBUS sights. Ensure the sights are fully deployed.
Carefully fire a group of shots. Observe where your bullets impact on the target.
Based on the impact location, adjust your sights. The MBUS sights typically have adjustments for both windage (left/right) and elevation (up/down). Most rear sights have the adjustment dials.
If your shots are hitting to the left, adjust the rear sight to the right (clockwise), and vice versa. If your shots are hitting low, adjust the front sight up, and the rear sight up (counter-clockwise), and vice versa. You’ll need to experiment with these.
Continue firing groups and adjusting your sights until your point of impact consistently matches your point of aim.
Consult the MBUS manual
Refer to the manual for your specific MBUS sights for detailed zeroing instructions, as adjustments can vary slightly between models.
Function Checks and Maintenance
Once the MBUS Flip Up Sight Install is complete and your sights are zeroed, perform a function check to ensure everything is working correctly.
Check for proper function
Flip the sights up and down repeatedly, making sure they lock securely in both the upright and folded positions. Check for any looseness or wobble.
Ensure stability
Observe the sights to make sure they remain stable.
Cleaning
Clean the sights regularly: Wipe them down with a clean cloth.
Inspecting for damage
Inspect for any cracks, loose screws, or other signs of wear.
Lubrication
Apply a small amount of lubricant (such as a silicone-based lubricant) to the hinge points of the sights if needed to ensure smooth operation.
Troubleshooting Common Issues
During your MBUS Flip Up Sight Install or when using your sights, you might encounter some common problems:
Loose Sights
If the sights feel loose or wobble, re-tighten the mounting screws.
Sights Won’t Lock
If the sights won’t lock in the upright or folded positions, ensure they are properly aligned and clean. Check for any obstructions.
Zeroing Difficulties
If you’re struggling to zero your sights, make sure you understand the adjustment mechanisms and consult the manual. Ensure you have a stable shooting position and that you’re using consistent ammunition.
Conclusion: Mastering the MBUS Flip Up Sight Install
The MBUS Flip Up Sight Install is a valuable skill that will significantly enhance your firearm’s functionality and your overall shooting experience. By following the detailed steps outlined in this guide, you can confidently install and zero your MBUS sights, providing a reliable backup sighting system that is easy to use. Remember to prioritize safety throughout the entire process and regularly practice with your new sights to familiarize yourself with their operation and improve your accuracy. This is a small step, but it plays a role in your mastery of the firearm. These sights are a great addition to any firearm. Remember to re-check your work and make sure your sight is properly installed. Congratulations on a successful MBUS Flip Up Sight Install. Enjoy your enhanced preparedness.
