Fiber Install Instructions Testing

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 set 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 set 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 set 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 set screws (included), plus a Glock front set 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 The Rear Fiber

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

Loosen the set screw. Using the included allen key, back out the rear sight’s set screw a few turns — just 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 and center it. Feed your new color into the channel and position it so it shows evenly on both ends.

Snug the set screw to lock it in. Firm but gentle — enough to capture the fiber. Don’t crush it.

Repeat for the second rear fiber if your sight uses two.

Swapping The Front Fiber

Confirm the firearm is unloaded and the muzzle is in a safe direction.

Loosen the front set screw with the included allen key. (Glock front sights use the included Glock front set screw.)

Remove the old fiber and insert the new one, centering it so it shows evenly.

Snug the set screw to lock it in. That’s it — you’re running a new color.

One Sight. Every Condition.

BRIGHT SUN

Red fiber
cuts glare

PARTLY CLOUDY

Green fiber
fastest target acquisition

LOW LIGHT

Orange fiber
boosts contrast

INDOOR RANGE

White fiber
clear & precise

TRAINING / COMPETITION

Black fiber for
precision shooting

Quick Tips

Never use heat or glue. FiberLok holds the fiber with a steel-captured set screw — that’s the whole point.
Don’t overtighten. Snug the set screw just enough to capture the fiber; crushing it dims the glow.
Center the fiber so it shows evenly on both ends for the brightest, most balanced dot.
Keep a spare set screw on hand — extras are included in your kit.