You're probably here because you've got a rifle scope to mount and you're wondering how to ensure it stays in place. You've probably heard of Loctite, but aren't sure which one to use.

Well, let me reassure you, you've stumbled on the right post. Dive in as we explore the world of Loctite in relation to rifle scopes. You'll get all your burning questions answered and probably discover answers to questions you didn't even know you had.

Choosing the Right Loctite

The moment you start diving into the world of Loctite, you quickly realize that it's not as simple as grabbing a random bottle off the shelf. Loctite offers several formulas, each with its own unique properties, designed for specific purposes.

  1. Loctite Purple 222: The go-to for most firearm enthusiasts. Why? Well, it's a low strength threadlocker. Perfect for small screws on scope bases and rings.
  2. Loctite Blue 242: If you can't get your hands on the Purple, this is your next best bet. It’s a medium strength threadlocker that works well with most screws.
  3. Loctite Red 271: Reserved for permanent applications. If you’re not planning on changing or adjusting your scope, this is an option.

By now, you're probably realizing the importance of choosing the right Loctite. Making an informed choice ensures your scope is secure while not risking any damage.

Why Use Loctite on Scope Ring Screws?

You may be asking yourself, "Why should I use Loctite on my scope ring screws?" This is where we dial into the specifics. The answer lies in three core reasons:

  • Vibration: Each shot you fire sends a wave of vibration through your rifle. Over time, this can cause screws to loosen. A small amount of Loctite provides added security.
  • Torque: While you can tighten screws to the proper spec using a torque wrench, using a thread locker such as Loctite can add an extra layer of assurance.
  • Consistent Accuracy: A loose scope can throw off your aim. Loctite ensures your screws stay in place, helping maintain consistent accuracy.

The use of Loctite adds an extra layer of security, giving you peace of mind while you're focusing on the target.

The Process of Applying Loctite on Scope Rings

Let's roll up our sleeves and get down to business. It's simpler than you might think. All you need is your chosen Loctite, your scope, and your rings or bases.

  1. Preparation: Make sure your screws and rings are clean and dry. Any oil or grease can interfere with the bonding process.
  2. Application: Apply a small amount of Loctite to the threads of your screws.
  3. Assembly: Fasten the screws into the scope base and ring screws.
  4. Wait: Allow time for the Loctite to dry before using your rifle.

There you have it - a straightforward process ensuring your scope will stay right where you want it.

Diving into the Purple - Loctite 222

The first horse in the race is Loctite 222 - a low strength purple threadlocker. It's a favorite among shooters due to its perfect balance of holding power and removability. It’s designed for securing metal fasteners that require regular adjustment or disassembly.

With the purple Loctite, removing the screws for adjustment or maintenance is a breeze. It keeps everything in place without turning the screws into immovable objects. In the world of Loctite, it’s like the featherweight champion.

The Medium-Weight - Loctite Blue 242

If the purple isn't available or you need something a touch stronger, turn your gaze towards Loctite Blue 242. It's a medium strength threadlocker, which makes it more resilient to vibration and shock.

While it still allows for disassembly using hand tools, it gives a bit more security than its purple counterpart. It’s like the middleweight fighter of the Loctite world - a solid choice for scope rings and bases.

The Heavyweight - Loctite Red 271

And then there's the heavyweight - Loctite Red 271. This isn't usually recommended for scope use due to its high-strength.

This is for when you need your screws to stay put forever, or close to it. It's an adhesive beast, you could say. It takes a heat gun or a micro torch to loosen screws treated with this.

Alternatives to Loctite for Scope Mounts

Now, while we've waxed lyrical about Loctite, it's not the only game in town. There are other brands out there, like Vibra-Tite VC3, which many gunsmiths rave about.

It provides a strong hold but still allows for easy disassembly. So, it never hurts to keep your options open and do a bit of comparison shopping.

Common Myths and Misconceptions

Before we wrap up, let's address a few myths and misconceptions about using Loctite for scopes.

  • Loctite causes damage: Some folks worry that Loctite might damage their scope. Rest easy. When used properly, Loctite won't harm your scope or rifle.
  • Loctite is a lubricant: Incorrect. Loctite is an adhesive, not a lubricant. It’s designed to keep your screws in place, not to make them easier to turn.
  • Loctite is hard to remove: The truth is, with the right tools (and the right Loctite), you can remove it without any hassle.


To sum it up, using Loctite for your rifle scope isn’t just a good idea, it’s a fantastic one. Whether you go for the Purple 222, Blue 242, or venture into other brands, what matters is that you give your scope the best chance to perform at its peak. After all, who wants to be the shooter who missed a perfect shot due to a loose scope?

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