Introduction
The Feyachi HL-20 Pistol Light is a compact, rail-mounted tactical flashlight designed to provide powerful illumination for handguns and other firearms equipped with Picatinny rails. Constructed from durable aerospace aluminum, it offers high brightness, reliable performance in various environments, and user-friendly operation with multiple lighting modes. This manual provides detailed instructions for setup, operation, maintenance, and troubleshooting to ensure optimal performance and longevity of your HL-20 Pistol Light.

Figure 1: Feyachi HL-20 Pistol Light Overview
Product Overview and Components
The HL-20 features a robust design with key components engineered for performance and durability.

Figure 2: Exploded View of HL-20 Components
- Optical Reflector & Lens: Designed for optimal light projection and beam clarity.
- Battery Buckle: Secures the CR123A batteries within the housing.
- Rail Locating Keys: Interchangeable keys for compatibility with various rail systems.
- Rail Fixing Screw: For secure attachment to the firearm's rail.
- Waterproof Ring: Ensures IPX5 water resistance.
- 2 Mode (ON/OFF+Strobe) Switch: Provides versatile lighting options.
Setup
Battery Installation
The HL-20 Pistol Light is powered by two CR123A batteries. Ensure correct polarity during installation.
- Unlock: Apply force to the spring lock and pull it upwards to unlock the battery compartment.
- Insert Batteries: Place two CR123A batteries into the compartment, observing the polarity indicators (+/-).
- Close: Hold the tail cap firmly and then close the spring lock until it clicks securely into place.

Figure 3: Battery Installation Guide
Mounting to Firearm Rail
The HL-20 is designed for universal compatibility with most rail-equipped handguns. It comes with 5 different Locating Keys (GL, TSW/99, 90two, P320, and 1913) to ensure a secure fit.
- Select Key: Choose the appropriate rail locating key for your firearm's rail type. The GL key is pre-installed. Use the provided Allen wrench to change keys if necessary.
- Attach Light: Loosen the rail clamp tension bolt. Align the light with your firearm's Picatinny rail and slide it into position.
- Secure Light: Tighten the rail clamp tension bolt firmly using the provided Allen wrench or a flathead screwdriver until the light is securely attached and does not wobble.

Figure 4: Universal Rail Compatibility

Figure 5: Standard Picatinny Mounting Examples
Operating Instructions
The HL-20 features an ambidextrous switch for easy operation.
- Momentary On: Press and hold either side of the switch for momentary illumination. Release to turn off.
- Constant On: Press and quickly release either side of the switch to activate constant illumination. Press again to turn off.
Video 1: Feyachi HL-20 New Upgrade Pistol Light - Demonstrates light modes and features.
Compatibility
The Feyachi HL-20 Pistol Light is designed for broad compatibility with various firearm models. Below is a table detailing some compatible models based on the included rail keys:
| Rail Key | Compatible Models |
|---|---|
| GL | GL17/GL19/GL20/GL22/GL23/GL25/GL32/GL44/GL45/GL19X/GL P80/GL17 GEN 4 |
| SIG SAUER | P220/P226/P227/P229/P320/(M18) |
| WALTHER | PPQ/P99/CCP/PPQ M1 |
| SMITH & WESSON | M&P 40/SD40VE/M&P 9MM/M&P 9 2.0MM & ORIGINAL/M&P 40 2.0 VERSIONS/M&P SHORT BUILDS |
| CZ | P-01/P-07/P-09/P-10C |
| SPRINGFIELD | SPRINGFIELD XD SERIES/SPRINGFIELD XDM SERIES/SPRINGFIELD ARMORY XDM 10MM |
| CANIK | TP9SA/TP9 V2 |
| TAURUS | TX22/TX22 22 CAL |
| OTHER | IWI MASADA/STEYR M9-A1/PSA DAGGER G19 CLONE 9MM/FN 509 SHORT BUILDS(9MM 1913 RAIL)/BERETTA 92/EAA WITNESSIKEL-TEC PMR-30/PSA ROCK 5.7X28MM/H&K P2000 LEM/40S&W |
Table 1: HL-20 Pistol Light Compatibility
Specifications
| Feature | Detail |
|---|---|
| Brightness | 1000 Lumens |
| Illumination Distance | 200-300 meters (approx. 600-984 feet) |
| Runtime | >2 hours |
| Material | Aerospace Aluminum (anodized surface) |
| Water Resistance | IPX5 (Waterproof) |
| Shock Resistance | 800 G gravitational acceleration tested |
| Battery Type | CR123A (Lithium Manganese Dioxide) |
| Dimensions | 3.4"D x 1.5"W x 1.5"H |
| Item Weight | 0.62 Pounds (approx. 9.9 ounces) |
| Mounting Type | Gun Mount (Picatinny Rail) |
| Light Source Type | LED |
Table 2: HL-20 Pistol Light Technical Specifications
Maintenance
- Cleaning: Use a soft, damp cloth to clean the exterior of the light. Avoid abrasive cleaners or solvents.
- Battery Replacement: Replace batteries when the light output becomes dim or inconsistent. Always use fresh, high-quality CR123A batteries.
- Storage: Store the light in a cool, dry place when not in use. Remove batteries if storing for extended periods to prevent leakage.
- Water Resistance: While IPX5 rated, avoid submerging the light for prolonged periods. Ensure the battery compartment is securely closed after battery changes to maintain water resistance.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Light does not turn on. | Dead or incorrectly installed batteries. | Check battery polarity and replace batteries if necessary. |
| Light is dim or flickers. | Low battery power. | Replace batteries with new ones. |
| Light is loose on the rail. | Mounting bolt is not tight or incorrect rail key used. | Ensure the rail clamp tension bolt is tightened securely. Verify the correct rail key is installed for your firearm. |
Table 3: Common Troubleshooting Steps
What's in the Box
Your Feyachi HL-20 Pistol Light package includes the following items:
- 1 x HL-20 Pistol Light
- 1 x User Manual
- 2 x Allen Wrench
- 5 x Different Rail Keys (GL, TSW/99, 90two, P320, 1913)
- 1 x Fixed Steel Sheet

Figure 6: Package Contents
Warranty and Support
The Feyachi HL-20 Pistol Light comes with a full warranty. For any product inquiries, technical support, or warranty claims, please visit the official Feyachi Store or contact their customer service through the platform where the product was purchased.





