Understanding the Technology Behind the Laser Bore Sight
What is a Laser Bore Sight?
Are you frustrated by the seemingly endless process of sighting in your new firearm? Do you find yourself burning through expensive ammunition at the range, constantly adjusting your sights without achieving the desired results? If so, you’re not alone. Many shooters struggle with the initial setup, spending valuable time and money getting their firearms ready for accurate shooting. Fortunately, there’s a simple and effective tool that can dramatically streamline this process: the laser bore sight.
Laser bore sights offer a convenient and efficient way to initially align your firearm’s sights before you ever fire a live round. They work by projecting a laser dot down the bore of your barrel, allowing you to quickly determine where your shots will land on the target. This initial alignment, or “boresighting,” drastically reduces the amount of time and ammunition needed for zeroing your scope or iron sights. This guide will delve deep into the world of laser bore sights, covering everything from the basics of what they are and how they work, to step-by-step instructions on how to use them effectively. Get ready to save time, save ammo, and improve your accuracy from the start!
At its core, a laser bore sight is a device designed to help you get your firearm on paper before the real shooting begins. It accomplishes this through the use of a laser beam precisely aligned with the bore axis of your firearm’s barrel. Think of it as a laser pointer that sits inside your barrel, showing you where your bullet *should* be going, at least in theory.
The fundamental principle is simple: the laser dot projects a red or green dot onto your target. This dot, when properly aligned with your sights, should indicate the approximate point of impact of your bullet. This allows you to make initial adjustments to your scope or iron sights, bringing your point of aim into closer alignment with your point of impact.
The beauty of this technology lies in its simplicity. By visually representing the bullet’s trajectory, a laser bore sight takes the guesswork out of the initial sighting-in process. It allows you to quickly make those crucial first adjustments without having to waste a significant amount of ammunition or spend hours at the range. This is particularly useful when mounting a new scope, changing a sight, or if you’ve removed and reattached your scope. It’s a valuable tool for any shooter, regardless of experience level. It significantly reduces the initial setup frustration and allows you to quickly move on to the fine-tuning phase of zeroing your firearm.
Different Varieties of Laser Bore Sights Available
Choosing the Right Type for Your Firearm
The market offers several different types of laser bore sights, each with its own unique features, advantages, and disadvantages. Choosing the right type for your specific needs is crucial. Understanding these variations will help you make an informed decision, saving both time and money.
One common option is the cartridge-type laser bore sight. These models are designed to mimic the shape and dimensions of a standard firearm cartridge. You simply insert the laser bore sight into the chamber of your firearm, just like you would a live round. This design is generally easy to use. However, you must ensure you have the correct caliber of laser bore sight for your firearm. For example, you would need a .223 Rem laser bore sight for a rifle chambered in that caliber.
Another popular choice is the arbor-type laser bore sight. These models typically involve a laser unit attached to a body that is inserted into the muzzle of the barrel. They often come with a set of adapters to accommodate different calibers. This versatility makes them a good option if you own multiple firearms with varying bore sizes. The main advantage is the ability to adapt to different calibers. They also tend to be less expensive than a cartridge-type for each individual caliber.
Magnetic laser bore sights represent another design, offering a quick and easy method for sight alignment. They attach magnetically to the barrel and project the laser down the bore. They often offer a balance of convenience and ease of use, providing a relatively quick and simple alignment procedure.
Finally, some bore sights mount directly into the bore, using expanding sleeves to center the laser light. These options often promise high accuracy.
When deciding on the right choice, think about the type of firearms you own, your budget, and your desired level of convenience. For instance, a shooter with several different calibers might benefit from an arbor-type laser bore sight, while someone with a single rifle may prefer a cartridge-type for ease of use. Remember to read reviews and compare prices before making your purchase.
The Paramount Importance of Safety
Essential Firearm Safety Rules
Before we dive into the practical steps, it’s absolutely critical to emphasize safety. Firearms are inherently dangerous, and even using a laser bore sight requires you to handle your firearm responsibly. Never take shortcuts when it comes to safety.
First and foremost, **always treat every firearm as if it’s loaded.** Even if you *think* it’s unloaded, always double-check. The number one rule of firearm safety is to keep the muzzle pointed in a safe direction. This means the firearm should never be pointed at anything you’re not willing to destroy, or that isn’t a safe target.
Before even touching your firearm, clear the area of any other individuals. You want to ensure a clear and safe space. When working with a firearm, it is recommended you wear eye protection. Although the laser beam from a laser bore sight is generally low-powered, you should still be diligent in eye safety.
After ensuring the area is clear, ensure that your firearm is unloaded. Remove the magazine (if applicable) and visually and physically check the chamber to confirm there is no ammunition present. If you are unsure, have someone else assist. Once confirmed, clear your workspace of potential hazards.
These safety precautions are non-negotiable. Never compromise on safety when handling any firearm, regardless of the task.
Preparing Your Firearm for Boresighting
Unloading, Cleaning, and Mounting
Once you’ve taken these crucial safety steps, you can begin preparing your firearm for the process. The initial setup is crucial for accurate results.
The first step is to carefully clear and inspect your firearm. We’ve already touched on clearing your firearm, but it bears repeating: *verify that the firearm is unloaded.* Remove the magazine (if applicable) and check both the chamber and the magazine well to ensure they are empty. Then, visually inspect the bore for any obstructions, like debris or cleaning patches. You don’t want anything to interfere with the laser light’s path.
Next, you may want to consider cleaning the bore. While not strictly necessary for laser boresighting, a clean bore generally leads to more consistent results during live-fire testing. Use a bore brush and cleaning solvent appropriate for your firearm’s caliber to remove any fouling or residue. Then, dry the bore thoroughly with a clean patch.
With your firearm unloaded, cleared, and the bore (optionally) cleaned, you are ready to install your laser bore sight. The exact steps will vary depending on the type of laser bore sight you’ve chosen.
For cartridge-type models, simply choose the correct cartridge for your firearm’s caliber and insert the laser bore sight into the chamber as you would a normal cartridge. If the fit is too loose, ensure you have the correct caliber of the sight.
If you’re using an arbor-type model, select the appropriate adapter for your firearm’s caliber. Insert the arbor into the muzzle of the barrel, making sure it fits snugly but isn’t forcing its way in.
For a magnetic model, simply attach it to the muzzle of your barrel.
After mounting the laser bore sight, it’s time to turn it on. Most models have a simple on/off switch. Be sure the laser is projecting clearly.
Sighting in Your Firearm with a Laser Bore Sight: A Step-by-Step Approach
Aligning Your Sights with the Laser Dot
Now that your firearm is prepared, it’s time to get to the main event: sighting in your firearm.
The first step is to set up your target. Choose an appropriate target distance for your caliber and intended zeroing distance. For example, if you’re zeroing your rifle for 100 yards, setting up your target at 25 yards (or 25 meters) can be a good starting point. Place your target securely at the selected distance. The type of target you use isn’t critical for this initial step. A simple paper target with a clear aiming point will work perfectly well.
Next, make sure you have a stable rest for your firearm. A shooting bench, sandbags, or a stable surface will help ensure that your firearm is held in place as you make adjustments.
Now, the crucial part: Aligning the laser dot with your sights. Depending on your firearm, the process will vary. Look at the laser dot and see where it’s landing on the target. The goal is to align the dot, which represents the point of impact of your bullets, with your point of aim (the center of your target or your crosshairs).
If you’re using iron sights, you’ll need to adjust the front and rear sights. The concept here is: if your laser dot is low, raise the rear sight or lower the front sight to bring the impact point higher. If your dot is to the left, move your rear sight to the right, or move the front sight to the left. Small adjustments are often sufficient.
If you’re using a scope, the process is slightly different but just as straightforward. Locate the windage and elevation turrets on your scope. The elevation turret controls vertical adjustments, and the windage turret controls horizontal adjustments. Use these turrets to move your crosshairs to where the laser dot is hitting. Most scopes are marked with indicators, and you will need to rotate the turrets to move your crosshairs. Remember to note which way to turn the turrets to adjust and consult your scope manual if unsure.
The Importance of Fine-Tuning After Initial Boresighting
Live Fire and Final Adjustments
Once you have aligned the laser dot with your sights, you’ve essentially completed the first phase of sighting in. However, the process isn’t over. Even with the best laser bore sight, it is a tool for rough alignment. You need to confirm the sight is ready for live fire. Remove the laser bore sight, and perform all the safety steps to reload and take your first shot.
Once the firearm is ready, take a shot and observe the impact point. This is where the rubber meets the road, and where the laser bore sight’s limitations become apparent. Now you can make the required adjustments to your sights to refine your groupings and achieve the desired point of impact. If the bullet is hitting low, adjust your scope’s elevation turret or your iron sight to point higher. If it’s to the left, adjust windage on your scope or iron sights. Repeat this process: take shots, make slight adjustments, and shoot.
This step, live fire confirmation, is crucial. The laser dot represents the *potential* impact point. The actual impact point will vary based on bullet drop, wind, and other environmental factors.
Maintaining Your Equipment and Addressing Common Issues
Troubleshooting and Care
To get the most out of your laser bore sight, proper maintenance is key. Cleaning it periodically will help to keep it operating at its best. Follow any maintenance procedures outlined in the manual, if any.
Battery replacement is crucial. If the laser is dim or doesn’t turn on, the battery may be dead. The battery requirements will vary depending on the laser bore sight, so consult the manual.
Proper storage can also extend the life of your laser bore sight. Store it in a dry, clean environment.
Although laser bore sights are quite reliable, occasional issues can arise. Knowing how to troubleshoot can help you get back on track quickly.
A common issue is the laser not turning on. Always check the battery first. Ensure you have the battery inserted correctly. Next, check the power switch, and make sure it isn’t damaged.
If you are noticing an inconsistent laser dot, there could be various reasons, including a loose sight in the barrel. If the laser dot is moving erratically, carefully check that your bore sight is snugly seated in the bore.
Inaccuracy is another frustrating problem. Double-check that your sights are properly adjusted and that you’ve confirmed your zero during live fire. Verify your rifle and scope are functioning as intended.
Conclusion: Shoot Straight with the Right Gear
Final Thoughts
Using a laser bore sight is a great way to save time, ammo, and increase your accuracy when sighting in your firearm. You’ve now learned what laser bore sights are, how they work, the types available, and, most importantly, how to use one safely and effectively.
Remember to always prioritize safety, be patient, and practice your skills. With a laser bore sight and some practice, you’ll be well on your way to consistent and accurate shooting. Now, go ahead and hit the range with confidence, and let your shots ring true!
