Fiber Install Instructions

Changing your fiber color is the easiest part of running TAG Precision sights. Thanks to the patented FiberLok™ system, there’s no heat, no glue, and no “melt-and-mushroom.” Back out one FiberLok™ screw, drop in a new fiber, lock it down — done in minutes, right at your bench.

SAFETY FIRST — EVERY TIME

Before you pick up a tool: point the muzzle in a safe direction, remove the magazine, and visually and physically confirm the chamber is empty. No exceptions.

How The FiberLok™ System Works

The FiberLok quick-change system: fiber rods lift out and lock in with a FiberLok screw

Machined lens for a crisp, uniform dot — no dim outer ring like melted fibers.
Mechanical retention. Exposed fibers pull in maximum light, and a steel-captured FiberLok™ screw locks each one so it can’t fail or fall out.

What You Need

Everything for the swap is in the FiberLok™ TSF Customization Kit:

✓ The included allen key (hex wrench)

✓ Your replacement fibers — 5 front and 8 rear, in up to 5 colors

✓ Spare FiberLok™ screws (included), plus a Glock front FiberLok™ screw

✓ Optional: tweezers or a small pick to seat the fiber

Fibers come pre-sized — no cutting, no melting. Just be sure you have the right kit size: 10.3mm fits standard TSF sights; 8.3mm is for select models.

Swapping Your Fiber

The same steps apply to both your front and rear fibers.

Confirm the firearm is unloaded. Muzzle in a safe direction, magazine out, chamber clear.

Loosen the FiberLok™ screw. Using the included Allen key, back out the fiber screw enough to release the fiber.

Remove the old fiber. Slide it out of its channel (tweezers or a small pick help here).

Insert the new fiber. Insert the fiber with the machined tip first. Ensure the necked-down tip seats fully against the shoulder inside the sight housing.

Secure the fiber screw. Using the included Allen key, tighten the fiber screw until it is snug. Do not overtighten.

One Sight. Every Condition.

BRIGHT SUN

Red fiber
cuts glare

PARTLY CLOUDY / LOW LIGHT

Green fiber
fastest target acquisition

Shooter aiming while wearing eye and ear protection

ASTIGMATISM / COLOR BLIND

Orange fiber for
astigmatism & color blindness

INDOOR RANGE / TRAINING

White fiber
clear & precise

RED DOT OPTIMIZATION

Black fiber to
zero-in your red dot

Quick Tips

Never use heat or glue. FiberLok holds the fiber with a steel-captured FiberLok™ screw — that’s the whole point.
Don’t overtighten. Snug the FiberLok™ screw just enough to capture the fiber; 2.5 lbs if you're using a torque driver.
Keep a spare FiberLok™ screw on hand — extras are included in your kit.