What Size Scope Rings For 3-9×40?
What Size Scope Rings for a 3-9×40 Scope?
When you’re mounting a scope on your rifle, one of the most important decisions you’ll make is what size scope rings to use. The wrong size rings can make it difficult to get a good sight picture, and they can also damage your scope.
In this article, we’ll discuss the different factors you need to consider when choosing scope rings, and we’ll recommend some specific rings that are a good fit for a 3-9×40 scope.
We’ll also provide some tips on how to install your scope rings properly so that you can get the most out of your new optic.
So, if you’re ready to learn more about scope rings, keep reading!
| Scope Ring Size | Objective Diameter | Eyepiece Diameter |
|---|---|---|
| 1 inch | 30 mm | 40 mm |
| 30 mm | 30 mm | 40 mm |
| 34 mm | 34 mm | 40 mm |
What are scope rings?
Scope rings are metal rings that mount a rifle scope to a rifle. They provide a solid and secure attachment point for the scope, and they also help to protect the scope from damage.
There are many different types of scope rings available, each with its own advantages and disadvantages. The type of scope rings you choose will depend on the type of rifle you have, the type of scope you are using, and your personal preferences.
Definition of scope rings
Scope rings are metal rings that are used to mount a rifle scope to a rifle. They are typically made of steel or aluminum, and they come in a variety of sizes and shapes.
Scope rings are typically mounted to the rifle’s receiver, which is the part of the rifle that houses the action. The rings are then secured to the receiver with screws or bolts.
Different types of scope rings
There are many different types of scope rings available, each with its own advantages and disadvantages. The most common types of scope rings are:
- Low-profile rings: Low-profile rings are the most popular type of scope ring. They are typically thin and sit close to the rifle’s barrel, which helps to improve the rifle’s balance.
- Medium-height rings: Medium-height rings are taller than low-profile rings, and they provide more clearance between the scope and the rifle’s barrel. This can be helpful for rifles with long scopes or for shooters who have a lot of eye relief.
- High-profile rings: High-profile rings are the tallest type of scope ring. They provide the most clearance between the scope and the rifle’s barrel, and they are typically used with scopes that have a lot of eye relief.
Materials used for scope rings
Scope rings are typically made of steel or aluminum. Steel rings are more durable than aluminum rings, but they are also heavier. Aluminum rings are lighter than steel rings, but they are not as durable.
Features of scope rings
Scope rings come with a variety of features that can affect their performance. Some of the most important features to consider when choosing scope rings include:
- Torque: The torque rating of a scope ring refers to the amount of force that can be applied to the screws or bolts without damaging the rings. A higher torque rating means that the rings can withstand more force, which can be helpful for rifles that are used in heavy recoiling calibers.
- Elevation: The elevation of a scope ring refers to the height of the ring above the rifle’s receiver. This is important to consider when choosing scope rings for rifles with different barrel profiles.
- Windage: The windage of a scope ring refers to the distance between the rings. This is important to consider when choosing scope rings for rifles with different scope tube diameters.
How to choose scope rings for a 3-9×40 scope?
When choosing scope rings for a 3-9×40 scope, there are a few factors you need to consider. These factors include:
- The type of rifle you have: The type of rifle you have will affect the size and type of scope rings you need. For example, if you have a bolt-action rifle, you will need scope rings that mount to the rifle’s receiver. If you have a semi-automatic rifle, you will need scope rings that mount to the rifle’s barrel.
- The type of scope you are using: The type of scope you are using will also affect the size and type of scope rings you need. For example, if you have a scope with a large objective lens, you will need scope rings that are tall enough to clear the lens.
- Your personal preferences: Finally, your personal preferences will also play a role in the type of scope rings you choose. For example, you may prefer scope rings that are low-profile or high-profile, or you may prefer scope rings that are made of a particular material.
Factors to consider when choosing scope rings
When choosing scope rings, there are a few factors you need to consider. These factors include:
- Torque: The torque rating of a scope ring refers to the amount of force that can be applied to the screws or bolts without damaging the rings. A higher torque rating means that the rings can withstand more force, which can be helpful for rifles that are used in heavy recoiling calibers.
- Elevation: The elevation of a scope ring refers to the height of the ring above the rifle’s receiver. This is important to consider when choosing scope rings for rifles with different barrel profiles.
- Windage: The windage of a scope ring refers to the distance between the rings. This is important to consider when choosing scope rings for rifles with different scope tube diameters.
How to measure your scope and
What Size Scope Rings For 3-9X40?
When choosing scope rings for a 3-9×40 scope, it is important to get the correct size. The rings need to be the right height to clear the scope’s objective lens, and they need to be the right diameter to fit the scope’s tube.
Determining the correct height
The first step is to determine the correct height for the scope rings. To do this, you will need to measure the distance from the top of the receiver to the center of the scope’s objective lens. This measurement is called the “eye relief”.
Once you have the eye relief measurement, you can use the following chart to determine the correct height for the scope rings:
| Eye Relief (inches) | Scope Ring Height (inches) |
|—|—|
| 3.5 | 1.0 |
| 4.0 | 1.1 |
| 4.5 | 1.2 |
| 5.0 | 1.3 |
| 5.5 | 1.4 |
| 6.0 | 1.5 |
Determining the correct diameter
The next step is to determine the correct diameter for the scope rings. The diameter of the scope rings needs to be the same as the diameter of the scope’s tube.
To measure the diameter of the scope’s tube, you can use a micrometer or a ruler.
Installing the scope rings
Once you have the correct size scope rings, you can install them on the rifle. To do this, you will need to:
1. Remove the factory scope mounts from the rifle.
2. Clean the mounting surfaces of the rifle and the scope rings with a degreaser.
3. Apply a thin coat of thread locker to the threads of the scope rings.
4. Install the scope rings on the rifle.
5. Tighten the scope rings until they are snug.
6. Make sure that the scope is properly aligned with the bore of the rifle.
Choosing the right scope rings for a 3-9×40 scope is important for ensuring a proper fit and performance. By following the steps in this guide, you can be sure to get the correct size scope rings for your rifle.
3. Common problems with scope rings
There are a few common problems that can occur with scope rings. These problems include:
- Loose scope rings. If the scope rings are not tight enough, the scope can move around on the rifle. This can lead to inaccuracy and can also damage the scope.
- Canted scope rings. If the scope rings are not installed properly, the scope can be canted. This can also lead to inaccuracy and can also damage the scope.
- Rings that are too tight. If the scope rings are too tight, they can damage the scope’s tube. This can also make it difficult to remove the scope from the rifle.
4. Tips for choosing the right scope rings
There are a few things you can keep in mind when choosing the right scope rings for your rifle. These tips include:
- Get advice from a qualified gunsmith. A gunsmith can help you choose the right size and type of scope rings for your rifle.
- Read reviews of different scope rings. There are many different brands and types of scope rings available on the market. Reading reviews can help you narrow down your choices and find a pair of rings that are well-made and will perform well.
- Shop around for the best price. Scope rings can vary in price from a few dollars to hundreds of dollars. Shop around to find a pair of rings that are within your budget.
Choosing the right scope rings for your rifle is important for ensuring a proper fit and performance. By following the tips in this guide, you can be sure to get the right scope rings for your needs.
What size scope rings do I need for a 3-9×40 scope?
The size of scope rings you need for a 3-9×40 scope will depend on the height of your rifle’s receiver. To determine the correct height, measure the distance from the top of your receiver to the center of your rifle’s rail. Once you have this measurement, you can use the following chart to find the correct size scope rings:
| Receiver Height | Scope Ring Height |
| ————– | ————– |
| 1.125″ – 1.375″ | 1″ |
| 1.375″ – 1.50″ | 1.5″ |
| 1.50″ – 1.625″ | 2″ |
| 1.625″ – 1.75″ | 2.5″ |
| 1.75″ – 1.875″ | 3″ |
| 1.875″ – 2.00″ | 3.5″ |
| 2.00″ – 2.125″ | 4″ |
What are the different types of scope rings?
There are two main types of scope rings: one-piece rings and two-piece rings. One-piece rings are a single, solid piece of metal that mounts to the rifle’s receiver. Two-piece rings consist of two separate rings that are attached to the rifle’s receiver with screws.
One-piece rings are typically more durable than two-piece rings, but they can be more difficult to install. Two-piece rings are easier to install, but they can be less durable than one-piece rings.
What are the advantages and disadvantages of one-piece scope rings vs. two-piece scope rings?
One-piece scope rings are typically more durable than two-piece scope rings, but they can be more difficult to install. Two-piece rings are easier to install, but they can be less durable than one-piece rings.
What are the different materials used for scope rings?
Scope rings are typically made from aluminum, steel, or titanium. Aluminum rings are the most lightweight option, but they are also the least durable. Steel rings are more durable than aluminum rings, but they are also heavier. Titanium rings are the most durable option, but they are also the most expensive.
What are the factors to consider when choosing scope rings?
When choosing scope rings, you need to consider the following factors:
- The height of your rifle’s receiver.
- The type of scope you are using.
- The material of the scope rings.
- The weight of the scope rings.
- Your budget.
How to install scope rings?
To install scope rings, you will need the following tools:
- A set of screwdrivers
- A torque wrench
- A scope level
1. Remove the factory scope mounts from your rifle.
2. Clean the mounting surfaces of your rifle with a degreaser.
3. Install the scope rings on your rifle.
4. Tighten the screws on the scope rings until they are snug.
5. Level the scope with a scope level.
6. Tighten the screws on the scope rings until they are snug.
What are the common problems with scope rings?
The most common problems with scope rings include:
- The scope rings are not the correct height for your rifle.
- The scope rings are not installed correctly.
- The scope rings are not durable enough.
- The scope rings are too heavy.
How to troubleshoot scope ring problems?
If you are having problems with your scope rings, you can try the following troubleshooting steps:
1. Check the height of your scope rings. If the scope rings are too low, you will not be able to get a proper cheek weld on your rifle. If the scope rings are too high, you will not be able to see through the scope properly.
2. Check the installation of your scope rings. Make sure that the scope rings are installed correctly and that they are tight enough.
3. Check the durability of your scope rings. If the scope rings are made from a cheap material, they may not be able to withstand
the best scope rings for a 3-9×40 scope will depend on the specific rifle you are using and your personal preferences. However, the following factors should be considered when making your decision:
- The diameter of the scope tube
- The height of the scope rings
- The type of mounting system you prefer
- The amount of weight you are willing to add to your rifle
By taking these factors into account, you can choose the best scope rings for your 3-9×40 scope and ensure that you have a solid and reliable platform for your optic.