How to Adjust an NcSTAR Laser Without Stripping the Screws

The Short Version

• Top screw controls elevation: Turning this screw moves the aiming dot up and down on your target.
• Side screw controls windage: Turning the screw on the side moves the aiming dot left and right.
• Move in quarter-turn steps: The small internal threads strip easily, so turn your small L-shaped Allen key in small fractions rather than full turns.
• Bench align before shooting: Match the laser beam to your aligned iron sights at home first to save ammunition and prevent chasing the dot at the range.

Locating the Adjustment Screws on Your NcSTAR Laser

Before you turn anything, take a close look at the metal body of your sight. NcSTAR builds several compact laser models for pistols and long guns. Some models have open adjustment ports with set screws visible right on the surface. Other models feature threaded protective screw caps that shield the adjustment dials from dirt, rain, and accidental bumps.

If your laser has smooth, raised round caps on the top and side, you must unscrew them counterclockwise with your fingers or a flat coin first. Once you remove those outer covers, you will see the tiny hex sockets tucked inside the housing.

The top screw controls elevation, which is the up and down movement of your aiming dot. Turning this screw changes the vertical angle of the internal laser diode. The side screw controls windage, which is the left-to-right movement of the beam across your target. You will find this side screw on either the right or left flank of the laser casing, depending on your specific model.

Inside the unit, a small brass or aluminum tube holds the laser diode. One corner of that tube rests against a tiny coil spring. The elevation and windage screws press against the opposite sides of that tube. When you tighten a screw, you push the tube against that spring. When you loosen a screw, the spring pushes the tube back out. Understanding this simple spring setup helps you avoid forcing the parts past their physical limits.

Safety Check and Tool Preparation

Working on any firearm accessory requires a safe workspace. You will be looking closely at the front of your firearm and aligning sights across the room, so safety must come first.

• Unload the firearm completely: Press the magazine release, remove the magazine, and set it aside in another room.
• Clear the chamber: Pull the slide or charging handle back, lock it open, and check the chamber with your eyes and your index finger to confirm no cartridge is present.
• Remove all live ammunition from the room: Keep your workbench completely free of live rounds while performing bench adjustments.
• Find the correct hex wrench: Use the small L-shaped Allen key that arrived in the original package. Most NcSTAR units use a tiny 0.050-inch or 1.5mm wrench. If you use a wrench that is even slightly too small, it will spin inside the screw head and strip the hex socket instantly.
• Inspect the wrench tip: Make sure the edges of your Allen key are sharp and flat. A worn, rounded wrench tip ruins soft brass or aluminum set screws.
• Check your rail mounting clamp: Before adjusting the beam, verify that the laser mount sits square inside a cross slot on your standard Picatinny or 20mm slotted accessory rail. Tighten the main rail mounting bolt securely so the laser body cannot rock forward or backward.

Step-by-Step Laser Adjustment Directions

Adjusting an NcSTAR laser requires a gentle touch. The internal threads are fine, and the internal housing does not have built-in mechanical stops to warn you when you reach the end of the adjustment range. Follow these steps carefully to align the dot without damaging the internal parts.

1. Seat the wrench completely into the screw socket: Push the short end of your small L-shaped Allen key straight into the set screw until it bottoms out. Never turn the wrench while it is sitting at an angle, because tilted tools slip and round out the edges of the socket.
2. Adjust elevation (up and down): Place your wrench into the top screw. Turning the wrench clockwise pushes the screw inward, which drives the internal diode downward and shifts the laser dot down on your target. Turning the wrench counterclockwise backs the screw out, allowing the internal coil spring to push the diode upward so the dot rises on your target.
3. Adjust windage (side to side): Place your wrench into the side screw. On models where the screw sits on the right-hand side of the unit, turning the wrench clockwise pushes the laser diode to the left. Turning that same right-side screw counterclockwise lets the internal spring push the diode to the right. If your model has the screw on the left side, the directions are reversed.
4. Turn in tiny increments only: Make adjustments in quarter-turn or eighth-turn steps. A quarter turn of the wrench creates a noticeable shift on a target ten yards away. Never spin the wrench several full rotations at once, or you will quickly lose track of your starting point.
5. Watch for mechanical resistance: As soon as you feel the screw turn stiffly, stop turning immediately. That stiffness means the internal diode tube has bottomed out against the housing wall. Forcing the screw past this point will strip the aluminum threads or snap the internal spring.
6. Watch for excessive looseness: If the screw turns with almost no friction and the laser stops moving, you have backed the screw out too far. The screw has separated from the internal diode tube. If this happens, turn the screw clockwise until you feel light pressure again as it re-engages the tube.

Bench Aligning with Iron Sights Before Firing

Aligning your laser to your fixed sights at home saves you time, frustration, and ammunition at the shooting range. This process is called co-witness, which simply means matching the laser to your iron sights so both aiming systems point to the exact same spot.

1. Set up a stable rest: Place your cleared, verified-empty firearm on a steady surface such as a shooting block, sandbag, or padded bench vise. The firearm must stay perfectly still while you adjust the screws.
2. Pick an aiming mark across the room: Choose a distinct spot on a distant wall, ideally between 10 and 15 yards away. A small piece of dark tape or a printed target works well.
3. Line up your iron sights: Look through your rear sight notch and place the top of the front sight post directly over the center of your aiming mark. Keep the firearm steady in this position. If you shoot with taller sights, our guide on lining up your backup iron sights explains how sight height affects your visual alignment.
4. Switch on the laser: Activate the beam and see where the dot appears relative to your iron sights. In most cases, a freshly mounted laser will point several inches high, low, or off to one side.
5. Walk the dot toward the front sight: Using small quarter-turn steps with your Allen key, move the elevation screw until the dot matches the height of your front sight post. Next, turn the windage screw until the dot rests directly on top of the front sight blade.
6. Verify sight alignment from behind the gun: Step back slightly and look down the sights again. When your front sight post sits centered in the rear notch and rests on your target mark, the laser dot should sit right there with it. You are now close enough to hit paper on your first live shots.

Range Verification Under Live Fire

Bench alignment gets the dot close, but it does not account for bullet drop or the recoil impulse of your ammunition. You must confirm the laser under live fire at the range. Zeroing means adjusting the dot so your shots land exactly where the dot points at a set distance, such as 15 yards for a defensive handgun or 25 yards for a rifle.

1. Mount a clean paper target: Set your target at your chosen distance. Fifteen yards is an ideal starting distance for a handgun laser because it provides a practical defensive range without exaggerating small aiming errors.
2. Use a supported bench rest: Sit down at the shooting bench and rest your hands or the firearm frame on a sandbag. Do not shoot offhand while zeroing, because natural body movement makes it hard to tell whether an error comes from the laser or your trigger press.
3. Fire a three-shot confirmation group: Place the laser dot directly in the center of the bullseye. Keeping the dot steady, squeeze the trigger smoothly to fire three rounds. Do not alter your aim between shots.
4. Identify the center of the group: Look at where the three bullet holes landed on the target paper. If all three holes cluster two inches below the bullseye and three inches to the right, your laser dot is pointing too high and too far to the left relative to your barrel.
5. Adjust the laser toward the bullet holes: To zero a laser, you must steer the dot toward the actual point of bullet impact. Using your hex wrench, turn the top screw clockwise to lower the dot. Then turn the side screw to move the dot toward the right. Adjust in half-turn steps between groups.
6. Shoot another three-shot group: Aim at the bullseye again and fire three more shots. Repeat this process until your three-shot group lands directly beneath the laser dot. Once your bullets strike where the dot rests, your zero is complete.

Why NcSTAR Lasers Drift and How to Keep the Dot Stable

A common complaint with budget laser units is that the dot wanders off target after firing twenty or thirty rounds. When shopping for an affordable rail mount pistol laser sight, you must remember that heavy handgun recoil generates sharp vibrations. Those vibrations can loosen delicate mounting hardware and shift internal adjustment screws.

The first reason a dot wanders is mount movement. Many shooters assume the laser internals slipped when the real issue is that the mounting bracket shifted along the accessory rail. The clamping screw must sit tightly against the cross slot of your rail. If your mount has slight play, the laser will jump forward under recoil. Tighten the rail clamp firmly using a proper hand tool, ensuring the cross-bolt seats squarely in the rail notch.

The second cause of wandering is loose adjustment threads. The small set screws fit into aluminum housings. Over time, recoil vibration can turn these screws by fractions of a millimeter. To lock them in place once you find your zero, you can apply a tiny drop of blue removable thread-locking fluid to the threads. Never use red thread-locking fluid, because red fluid requires high heat to remove and will permanently seize the small screws.

The third cause is weak internal spring tension. If your windage or elevation screw is backed almost all the way out, the internal coil spring loses its tension. With little pressure holding the diode capsule in place, the shock of each gunshot makes the laser bounce inside the body. If you notice your dot jumping and the screw feels very loose, your laser is sitting at an unnatural angle on the rail. Loosen the main rail clamp, reseat the optic flat on the rail, and re-zero so the adjustment screws stay closer to the middle of their mechanical travel.

FAQs

What size hex wrench fits an NcSTAR laser adjustment screw?

Most NcSTAR compact laser sights use an imperial 0.050-inch Allen key, while some foreign-production runs use a metric 1.5mm key. Always use the original wrench that came in the box to avoid rounding the screw heads. If you lost your original tool, purchase a precision hex driver set and test the fit gently by hand before applying any turning pressure.

At what distance should I zero my handgun laser?

A distance of 10 to 15 yards works best for handguns. Because a laser sight sits an inch or two below the bore of the barrel, the laser beam and the bullet path travel along different angles. Zeroing at 15 yards keeps the bullet impact within an inch or two of the laser dot at all practical indoor and personal defense distances.

What should I do if the adjustment screw spins without moving the dot?

If the screw spins freely with no resistance, you have backed it out too far, and the tip has lost contact with the internal diode tube. Turn the screw clockwise several turns until you feel the threads catch and meet light resistance. If the screw spins continuously in both directions without catching, the soft internal aluminum threads have stripped, which means the housing can no longer hold an adjustment.

Why does my laser dot flicker or turn off during live fire?

Flickering under recoil usually points to a loose battery cap rather than an adjustment problem. Handgun recoil jolts the battery contacts away from the power terminals for a split second. Check that the battery compartment cap is screwed down snug, wipe the battery surfaces clean of manufacturing oil, and verify that the contact spring inside the cap has adequate tension.