How To Mount Scope On Ar 15 With Front Sight: Expert Guide
Mounting a scope on an AR-15 with a front sight can be challenging. But, it’s definitely possible with the right steps.
Many AR-15 owners want the accuracy of a scope while keeping the front sight. This combination can enhance your shooting experience. Whether you’re a beginner or an experienced shooter, understanding this process is crucial. In this guide, we’ll walk you through the steps to mount a scope on your AR-15 without removing the front sight.
You will learn how to align the scope correctly and ensure it works seamlessly with the front sight. By the end, you’ll be confident in your ability to enhance your AR-15 setup. Let’s get started!

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Choosing The Right Scope
Mounting a scope on your AR 15 with a front sight requires careful planning. The first step is to choose the right scope. The scope you select impacts your shooting experience and accuracy. Below, we explore the different types of scopes and key factors to consider.
Types Of Scopes
There are various scopes available in the market. Understanding their differences helps in making the right choice.
- Red Dot Scopes: These scopes are great for quick target acquisition. They are suitable for close to medium-range shooting.
- Holographic Scopes: These provide a clear sight picture and are useful in low light conditions. They are also good for close to medium ranges.
- Variable Power Scopes: These allow you to adjust the magnification. They are versatile and can be used for both close and long-range shooting.
- Fixed Power Scopes: These have a set magnification level. They are simpler to use but less versatile.
Factors To Consider
When selecting a scope, consider the following factors:
- Magnification: Choose a magnification level based on your shooting range. Higher magnification is better for long distances.
- Lens Quality: High-quality lenses provide clear images. Look for scopes with multi-coated lenses.
- Durability: Ensure the scope is durable and can withstand recoil. Look for waterproof and shockproof features.
- Eye Relief: This is the distance between your eye and the scope. Adequate eye relief is important for safety and comfort.
- Weight: A lighter scope is easier to handle. Consider the overall weight of your AR 15 after mounting the scope.
Choosing the right scope involves understanding your needs. Consider the types of scopes and these key factors to make an informed decision.
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Necessary Tools
Mounting a scope on an AR-15 with a front sight requires specific tools. Having the right tools ensures the process is smooth and accurate. This section will cover the necessary tools you need to get started.
Basic Tools Required
Start with a flathead screwdriver. This helps with the removal of any existing optics. You will also need a torque wrench. This ensures the screws are tightened correctly. Another essential tool is an Allen wrench set. These are used to secure the scope rings. A bubble level is also crucial. This helps in aligning the scope properly.
Optional Tools For Precision
For those seeking precision, consider a gun vise. This holds the rifle steady. A bore sighter is also useful. It helps in aligning the scope quickly. Some prefer using a laser bore sighter. This provides even more accuracy. Finally, a thread locker can be handy. It prevents screws from loosening over time.
Preparing Your Ar 15
Before mounting a scope on your AR 15 with a front sight, preparation is crucial. Proper preparation ensures stability and accuracy. In this section, we will discuss safety precautions, cleaning, and inspecting your AR 15.
Safety Precautions
Safety should always come first. Ensure your AR 15 is unloaded. Remove the magazine and check the chamber for any rounds. Use a gun lock to prevent accidental firing. Keep your workspace clear of distractions and ensure proper lighting.
Cleaning And Inspecting
Begin by cleaning your AR 15. Use a cleaning kit to remove any dirt or residue. Clean the barrel, bolt carrier group, and other components. This ensures your scope will mount securely.
Next, inspect your AR 15. Look for any wear or damage. Check the front sight for stability. Ensure all screws are tight. If you find any issues, address them before proceeding.
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By following these steps, you ensure your AR 15 is ready for the scope mounting process. Safety and maintenance are key to a successful installation. With a clean and inspected rifle, you can proceed with confidence.
Mounting The Base
Mounting the base is crucial for stability and accuracy. The base holds the scope in place. It must be installed correctly. This ensures your shots hit the target. Follow these steps for a secure mount.
Aligning The Base
Place the base on the top rail of the AR 15. Ensure it fits snugly. The base should align with the grooves. Check for any gaps. These can cause the scope to shift. Use a level to make sure the base is straight. A crooked base affects your aim.
Securing The Base
Once aligned, secure the base. Use a torque wrench for the screws. Tighten them to the manufacturer’s specifications. Over-tightening can damage the rail. Under-tightening can make the base loose. Check each screw. Ensure they are evenly tightened. This keeps the base secure. Your scope will stay in place. Your shots will be more accurate.
Installing The Scope
Mounting a scope on your AR-15 with a front sight can be tricky. But with the right steps, it can be easy. This guide will help you install your scope correctly.
Positioning The Scope
The first step is to position the scope on your AR-15. Ensure the rifle is on a stable surface. Use a gun vise if you have one. This keeps the rifle steady. Place the scope on the rail. It should be above the receiver. Make sure it is centered. The crosshairs should be level. Use a bubble level if needed. Tighten the mounting rings lightly. Do not over-tighten them yet. This allows for adjustments later.
Adjusting Eye Relief
Eye relief is the distance from your eye to the scope. It is important for a clear view. Hold the rifle in your shooting position. Move the scope forward or backward. Find the spot where you see a clear image. This is your eye relief. Mark this position. Now, tighten the mounting rings more. Ensure everything is secure. Test the eye relief again. Make sure it is still clear. Adjust if needed.
Dealing With Front Sight Obstruction
Mounting a scope on your AR-15 with a front sight can pose challenges, especially when it obstructs your view. To navigate this issue effectively, consider the following strategies:
Using Riser Mounts
Opt for riser mounts to elevate the scope above the front sight, providing a clear line of sight and minimizing obstruction.
Opting For Co-witness
Choose co-witness sights that align with your scope reticle, allowing you to use both the front sight and scope simultaneously for enhanced accuracy.
Final Adjustments
Final adjustments are crucial when mounting a scope on your AR-15 with a front sight. These steps ensure that your scope is perfectly aligned and secure. This will improve your shooting accuracy. Let’s dive into the final adjustments you need to make.
Leveling The Scope
Leveling the scope is the first step. Place the rifle on a stable surface. Use a bubble level tool. Ensure the rifle is level. Then, place the bubble level on the scope. Adjust the scope until it is level. This step prevents any tilt. A tilted scope affects your shooting precision.
Tightening Screws
Next, focus on tightening screws. Start with the screws on the scope rings. Tighten them evenly. Use a torque wrench for precision. Refer to the manufacturer’s recommended torque settings. Over-tightening can damage the scope. Under-tightening can make it loose. Double-check all screws. Ensure they are secure. This step ensures your scope remains stable.
Completing these final adjustments will make sure your scope is mounted correctly. A well-mounted scope leads to better accuracy. And a more enjoyable shooting experience.

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Testing And Zeroing
When mounting a scope on your AR-15 with a front sight, the crucial steps of testing and zeroing ensure accuracy and precision.
Initial Testing
Before zeroing the scope, conduct initial tests to ensure proper mounting and functionality.
- Check for any loose screws or misalignments.
- Verify the scope is securely attached to the rifle.
- Inspect the front sight for any obstructions.
Zeroing The Scope
Zeroing the scope is essential for accurate shooting and target acquisition.
- Set up a stable shooting position and target at a known distance.
- Fire a group of shots to determine the initial point of impact.
- Adjust the windage and elevation turrets to move the reticle to the point of impact.
- Repeat the process until the point of aim matches the point of impact.
Maintenance Tips
Mounting a scope on an AR 15 with a front sight can be challenging. Once it’s done, proper maintenance is crucial. Follow these tips to ensure your scope remains in top condition and functions correctly.
Regular Cleaning
Regular cleaning is essential. Dust and dirt can affect the scope’s performance. Use a soft, lint-free cloth to clean the lenses. Avoid using harsh chemicals that can damage the lens coating. A simple lens cleaning solution works best.
Clean the scope body too. Wipe it down with a dry cloth. Cleaning prevents buildup that can scratch the surface or affect the mounting system.
Periodic Re-checking
After mounting, periodically re-check the scope’s alignment. Firing your AR 15 can shift the scope slightly. Regularly verify the zeroing to ensure accuracy.
Check the mounting screws. Tighten any that have loosened. This prevents the scope from moving during use.
Keep a small toolkit handy. It allows you to make quick adjustments in the field if needed. A simple re-check ensures your scope performs optimally every time.
Frequently Asked Questions
How To Mount A Scope On Ar-15 With Front Sight?
To mount a scope on an AR-15 with a front sight, use a high mount. This will ensure the scope clears the front sight post, providing an unobstructed view.
Can I Use A Red Dot With Front Sight?
Yes, you can use a red dot with a front sight. Co-witnessing allows both the red dot and iron sight to be aligned for accuracy.
What Tools Do I Need To Mount A Scope?
You will need a torque wrench, scope rings, and a mounting base. These tools ensure the scope is securely and accurately mounted.
Do I Need A Riser For My Scope?
A riser may be needed to elevate the scope above the front sight. This ensures a clear and unobstructed view through the scope.
Conclusion
Mounting a scope on an AR 15 with a front sight seems tricky. But with the right steps, it’s doable. Start with a solid mount. Ensure it’s secure. Align your scope correctly. Double-check for stability. Practice makes perfect. Take your time.
Soon, you’ll have a well-mounted scope. Your aim will improve. Happy shooting!