Introduction: Why Proper Sight Installation Matters
Upgrading your pistol sights is one of the most impactful performance improvements you can make. At TAG Precision, every sight system is engineered for precision fitment and durability, including our FiberLok™ system which has been proven to withstand 65,000+ rounds of testing.
High-quality sights deserve proper installation.
Whether you're installing fiber optic or tritium sights on your Glock or other pistol, this guide walks you through the correct, professional-grade process to ensure your sights perform exactly as intended.
Do You Need a Gunsmith?
TAG Precision recommends using a gunsmith with the tools to precisely fit your new sights. However, you can install pistol sights yourself, but there are cases where a professional is recommended:
- Tight dovetail fit
- High-end slides or finishes
- Tritium sights (to avoid vial damage)
- Lack of proper tools
Your local gunsmith has the tools and experience to install your new pistol sights for a small cost, but you can also do the installation yourself with good results. Proper installation is what ensures all that performance translates to your pistol — but only if they're installed correctly. Improper installation can lead to:
- Misaligned shots
- Damaged sights or slide
- Loose fitment over time
- Reduced confidence in your firearm and your skills
Tools You'll Need to Install Pistol Sights
These steps apply to most pistols with dovetail sights, including Glock, Sig Sauer, Smith & Wesson M&P, and similar models. Before starting, gather the proper tools. Using the wrong tools is the #1 cause of damaged sights.
Essential Tools
- Sight pusher tool (preferred method for pushing dovetail sight into position)
- Non-marring nylon punch (alternate method of installing rear dovetail sight)
- Small hammer (to use with nylon punch)
- Bench block or padded vise
- Hex/Allen keys (for set screws)
- Blue thread locker (Loctite 242)
Optional but Recommended
- Digital calipers (for centering sight)
- Gun oil or light lubricant
- Masking tape (to protect slide finish)
Browse precision-fit pistol sights
Step 1: Ensure Firearm Safety
Never work on a loaded firearm.
Before doing anything:
- Remove the magazine
- Cycle and lock the slide open
- Visually and physically check the chamber
Step 2: Remove the Slide
This isolates the slide for safe and easy handling.
- Disassemble your pistol according to manufacturer instructions
- Remove the slide from the frame
- Take out the recoil spring and the barrel
Step 3: Remove Existing Sights
A. Rear Sight Removal
Best Method: Sight Pusher Tool
- Secure the slide in the sight pusher
- Slowly apply pressure to drift the dovetail sight out
- Always push in the correct direction (consult firearm manufacturer if needed)
Alternative Method: Punch + Hammer
- Place slide on a bench block
- Use a non-marring (nylon etc.) punch*
- Tap firmly but in a controlled fashion
*Do not use steel punches as they will damage the sight and slide.
B. Front Sight Removal
Most modern pistols use one of these two systems:
Screw-Mounted Front Sight
- Use the correct hex or front sight tool
- Remove screw from underside of slide
- Lift sight out
Dovetail Front Sight
- Remove like a rear sight using a punch or pusher
Step 4: Clean the Dovetail
Before installing new sights:
- Remove debris, oil, and old thread locker
- Lightly clean with solvent if needed
- Ensure surfaces are dry and smooth
A clean dovetail ensures proper fitment and prevents movement.
Step 5: Install the Front Sight
Screw-Mounted Front Sight
- Place sight into position
- Apply a small amount of blue thread locker
- Tighten screw securely (do not overtighten)
Step 6: Install the Rear Sight
Using a Sight Pusher (Recommended)
- Align sight with dovetail in slide
- Slowly press into place
- Stop near center position
Using a Punch
- Start sight into dovetail in slide
- Tap gradually into position with nylon punch
- Use controlled, even strikes
Centering the Rear Sight
- Visually center the sight
- Use calipers for precision if available
- Final adjustments can be made at the range
Need precision-machined sights for perfect fit?
Step 7: Secure and Final Check
- Tighten any set screws (if applicable)
- Apply thread locker where needed
- Confirm sight alignment
- Reassemble firearm
Cycle the slide to ensure everything functions correctly.
TAG Precision sights are engineered for:
- Precision fitment
- Long-term durability
- Real-world performance under recoil
Common Installation Mistakes to Avoid
Using the Wrong Tools
Steel punches and improper tools can permanently damage your slide or sights. Use nylon punches instead, or even better, a sight pusher tool.
Skipping Thread Locker
Without it, screws can loosen under recoil.
Over-Tightening Screws
This can strip threads or damage components.
Forcing the Fit
High-quality sights are designed for tight tolerances, but forcing them can cause damage.
Not Verifying Zero
Always confirm alignment at the range after installation.
Fiber Optic vs. Tritium Installation Differences
While installation steps are largely the same, there are key differences:
Fiber Optic Sights (FiberLok)
- More forgiving during install
- No sealed components
- Durable fiber can easily be removed during install if desired
Tritium Sights
- Require extra care (glass vials inside)
- Avoid impact during installation
- Cannot be repaired if damaged
Final Thoughts: Do It Right the First Time
Installing Glock or other pistol sights isn't complicated, but it does require the right tools, patience, and attention to detail.
The difference between a rushed install and a proper one shows up immediately in your shooting performance.
Frequently Asked Questions
Can I install dovetail pistol sights without a sight pusher?
Yes, but a nylon punch method carries more risk of damage. A sight pusher is strongly recommended.
How tight should pistol sights be?
They should fit snugly in the dovetail without excessive force. Set screws should be firm but not overtightened.
Do I need thread locker?
Yes. Blue thread locker prevents screws from loosening under recoil.
How long does it take to install sights?
Typically 20–40 minutes with proper tools.
Will new sights need adjustment?
Yes. Final zero should always be confirmed at the range.
Upgrade Your Sights with Confidence
Proper installation is only part of the equation — your sights need to perform when it matters. TAG Precision builds high precision, high performance pistol sights that not only elevate your shooting experience, but that are guaranteed for life.
