Mounting a scope on your rifle is a fundamental skill every shooter should know. Learning how to mount scope on rifle correctly is the single biggest factor in achieving consistent accuracy. A poorly mounted optic can cause frustrating misses, no matter how expensive your gear is. This guide will walk you through the process with clear, step-by-step instructions. You’ll need some basic tools and a bit of patience, but the results are worth it.
How To Mount Scope On Rifle
Before you touch a screw, it’s crucial to understand the goal. Proper scope mounting means securing the optic so it’s perfectly aligned with the rifle’s barrel. It must be level, centered, and at the correct eye relief for you. Rushing this process will only lead to problems on the range. Let’s start by gathering everything you’ll need.
Tools and Materials You’ll Need
Having the right tools makes the job smooth and prevents damage. Here’s your checklist:
- A quality scope mounting kit (rings and base)
- A gunsmithing screwdriver set or hex keys (correct size for your screws)
- A torque wrench (inch-pounds, not foot-pounds)
- Gun cleaning solvent and degreaser
- Thread-locking compound (like blue Loctite)
- A leveling kit or a simple bubble level
- Lens cleaning cloths
Step-by-Step Mounting Instructions
Follow these steps in order for the best results. Work on a clean, well-lit table.
Step 1: Prepare the Rifle and Components
First, ensure the rifle is unloaded. Remove the bolt if possible for safety and easier access. Thoroughly degrease all the screw holes in the receiver and the threads on all screws. Any oil or grease can cause improper torque readings. Also, lightly degrease the bottom of the scope base.
Step 2: Install the Scope Base or Rail
Place the base onto the receiver, aligning it with the screw holes. Apply a small drop of blue thread-locker to each screw. Finger-tighten all screws to seat the base evenly. Then, using your torque wrench, tighten the screws in a criss-cross pattern to the manufacturer’s specification. This is often between 15-30 inch-pounds, but always check your base’s manual.
Step 3: Set the Scope in the Rings (Loosely)
Split the scope rings—you’ll have a top and bottom half for each. Place the bottom halves onto the base. Now, carefully set your scope into the bottom rings. The adjustment turrets should be on top and facing the correct direction. Then, place the top halves of the rings on, and finger-tighten the screws just enough to hold the scope in place. It should still be able to slide and rotate slightly.
Step 4: Set Eye Relief and Level the Scope
This is the most critical alignment step. Shoulder the rifle in a natural shooting position with your eyes closed. When you open your eyes, you should see a full, clear picture through the scope without any dark shadowy rings. This is proper eye relief. Slide the scope forward or backward until you achieve this, then tighten the ring screws just enough to hold that position.
Next, level the scope to the rifle. Use a leveling tool between the flat part of the turret and the rifle’s action, or hang a weighted string in front of the rifle to use as a vertical reference. Gently rotate the scope until it is perfectly level. Take your time here.
Step 5: Final Tightening and Torquing
Once level and with correct eye relief, it’s time to secure everything. Using your torque wrench, tighten the ring screws in a diagonal pattern. A common torque spec for ring screws is 15-18 inch-pounds, but again, refer to your ring manufacturer. Overtightening can crush your scope tube. Tighten gradually, alternating between screws to apply even pressure.
Bore Sighting and Final Zeroing
Bore sighting gets you on paper, saving time and ammo. You can use a laser bore sighter or a visual method. With the rifle secured in a rest, look directly through the bore and center a target at 25 yards. Without moving the rifle, adjust your scope’s windage and elevation turrets until the crosshairs are centered on that same target. This is a rough alignment.
The final and essential step is to zero at the range. Fire a three-shot group at your desired distance (like 100 yards). Then, adjust your scope based on where that group hits relative to your point of aim. Always follow the directions on your scope cap for which way to turn the dials. Fire more groups until you are consistently hitting your aiming point.
Common Mistakes to Avoid
- Overtightening screws: This is the most frequent error. Always use a torque wrench.
- Ignoring eye relief: A scope too far forward or back causes poor sight picture and can lead to injury from recoil.
- Forgetting to level: A canted scope causes accuracy errors that get worse with distance.
- Using dirty threads: Grease causes false torque readings, leading to loose screws later.
- Skipping thread-locker: Vibration from shooting can and will loosen screws over time.
FAQ Section
How tight should scope rings be?
You must use a torque wrench. Typical specifications range from 15 to 18 inch-pounds for the ring screws, and 15-30 for the base screws. Never guess—overtightening damages scopes.
What is the best way to level a rifle scope?
A dedicated scope leveling tool is best. A low-cost method is to use a small bubble level on the flat section of the scope’s elevation turret while ensuring the rifle itself is also level in a vise.
Do I need to use Loctite when mounting a scope?
Yes, a small amount of blue (removable) thread-locker on the base screws is highly recommended. It prevents vibration from loosening them during firing. Avoid using it on the ring screws unless the manufacturer states otherwise.
Why is my scope moving after I shoot?
This usually indicates something is loose. Check that all base and ring screws are properly torqued. It could also be that the scope rings are mismatched to the base or are of low quality. The recoil of the rifle is substantial.
Can I mount a scope myself without special tools?
While you can attempt it with basic hex keys, it’s not advised. Without a torque wrench, you risk damaging your scope or having a mount that comes loose. The proper tools are a wise investment for any rifle owner.
Mounting a scope properly might seem detailed, but each step has a clear purpose. By taking your time, using the right tools, and following these instructions, you’ll create a solid foundation for your rifle’s accuracy. Remember, a good zero starts with a good mount. Now you’re ready to head to the range with confidence and get that scope dialed in for your next outing.