Thumb Ledge X300 series
The Ultimate Thumb Rest for Handguns
The Thumb ledge utilizes a mounting rail for Surefire’s X300 series lights for better recoil control and fits most mainstream holsters.
Revolutionize Your Shooting Experience with Thumb Ledge X300 series
Key Features
Minimalistic Design
Unobtrusive yet functional, seamlessly integrates with your firearm.
Holster Friendly
Fits most X300 series-compatible holsters, including popular models like SAFARILAND Duty holsters.
Ambidextrous Options
Available in right-handed and left-handed variations.
Precision Fit
Oversized rail grooves to prevent rattling, ensuring a secure fit.
Why Choose Thumb Ledge X300 series?
Adding a Thumb Ledge to your handgun provides a significant upgrade in recoil control and muzzle stability. Here’s why the Thumb Ledge X300 series stands out:

Enhanced Performance
Experience faster aiming for follow-up shots.
Non-Invasive Design
No frame modifications or permanent changes needed.
Holster Compatibility
Maintain the functionality of your favorite holsters.
Versatility
Ideal for users who rely on tactical flashlights like the SUREFIRE X300 series.
Return to Original
Easily removable to restore your handgun to its original form.
How to Install Thumb Ledge X300U-A
- Remove the three screws of the Rail Guide on the support-hand side of your SUREFIRE X300U-A, X300T-A, or X300V-A.
- Replace the Rail Guide with the Thumb Ledge.
- Place the thumb of your support hand on the Thumb Ledge for grip during shooting.

Tip: The rail grooves are intentionally tight to prevent rattling. If installation is too difficult, file the grooves slightly for a perfect fit. File incrementally and test frequently.
How to Install Thumb Ledge X300U-B
- Continue turning the T-slot thumbscrew until the clamp comes off. You do not need to remove the T-slot thumbscrew completely.
- Once the clamp is disengaged, for right-handed users, insert the right-handed Thumb Ledge and tighten the T-slot thumbscrew to secure it. For left-handed users, start by threading the spring. Then, insert the left-handed Thumb Ledge, reattach the removed clamp, and tighten the T-slot thumbscrew to complete the installation.
- Once installed, grip the handgun with your support hand’s thumb resting on the Thumb Ledge when shooting.

Tip: You may experience some resistance when removing and installing the clamp, but slightly angling it can help. Be very careful not to damage the threads. Excessive force can lead to damage, so proceed with care.
Compatibility
The Thumb Ledge X300U-A is compatible with the following models:
– **X300Ultra-A**
– **X300Turbo-A**
– **X300Vampire-A**
– **X300Turbo-A-TN**
– **X300Ultra-A-TN**
The Thumb Ledge X300U-B is compatible with the following models:
– **X300Ultra-B**
– **X300Turbo-B**
– **X300Vampire-B**
– **XH30**
– **XH35**
– **X400U**
– **X400UH**
– **X400VH**
FAQs
1. What’s included in the package?
2. Can I use Thumb Ledge X300U-A with X300 “-B” models?
3. Will this fit my holster?
4. Is it difficult to install?
Order Now and Upgrade Your Shooting Precision!
Take your shooting experience to the next level with the Thumb Ledge X300U series. Designed for precision, compatibility, and durability, this thumb rest is a must-have accessory for SUREFIRE X300 series users.