Safariland 6390RDSO832131 ALS Black Fits Glock 17 MOS Gen 3-4 Compatible w/ SureFire X300U Right Hand

Name: Safariland 6390RDSO832131 ALS Black Fits Glock 17 MOS Gen 3-4 Compatible w/ SureFire X300U Right Hand
Brand: Safariland
SKU: 6390RDSO832131-781602242349
Price: 158.99 USD
Availability: InStock

Overview

Built for pistols equipped with a red dot sight, this open-top holster is aimed at shooters who want a streamlined carry option with a secure retention system. The Automatic Locking System holds the firearm without straps or snaps, and release is handled by the thumb before a straight-up draw. Its mid-ride belt loop keeps the holster positioned close to the body, making it a practical choice for range use or field carry where a low-profile setup matters. It is configured for right-hand use and fits Glock 17 MOS Gen 3-4 pistols with a SureFire X300U.

Why Hunters Choose the Safariland

Firearms Equipped

Red dot sights

Als Internal

Locking system secures the weapon

Thumb-operated Retention

Supports a straightforward straight-up draw

Open-top Design

Keeps the holster simple and

Mid-ride Belt

Loop rides close to the

Key Features

Designed for firearms with red dot sights mounted
Open-top design with no straps or snaps to manage
Automatic Locking System retains the weapon in all directions
Thumb-operated ALS release supports a straight-up draw
Mid-ride belt loop rides close to the body
Fits Glock 17 MOS Gen 3-4, right-hand carry

Best Used For

For hunters carrying a Glock 17 MOS Gen 3-4 with a mounted red dot sight
For right-handed users wanting thumb-operated retention without straps or snaps
For range sessions or field carry where a close-to-body mid-ride setup is preferred
For shooters using a SureFire X300U-equipped pistol and needing compatible holster fit

Specifications

Blade Finish	STX Tactical
Color	Black
Firearm Fit	Glock 17 MOS Gen 3-4
Hand	Right Hand
Holster Style	Open-top
Light Compatibility	SureFire X300U
Red Dot Sight Compatible	Yes
Retention System	ALS (Automatic Locking System)
Ride Height	Mid-ride belt loop

Pros

Designed for firearms equipped with red dot sights
ALS internal locking system secures the weapon without straps or snaps
Thumb-operated retention supports a straightforward straight-up draw
Open-top design keeps the holster simple and accessible
Mid-ride belt loop rides close to the body
Fits Glock 17 MOS Gen 3-4 and SureFire X300U compatible setup

Considerations & Trade-offs

Designed specifically for firearms with red dot sights, so it is not a general-purpose holster for non-optic setups.
Open-top design with ALS retention means there are no straps or snaps to manage, which may not suit users who prefer fully covered retention.
Mid-ride belt loop rides close to the body, offering a compact carry profile but less adjustability than some higher-ride or modular options.
Listed fit is Glock 17 MOS Gen 3-4 with SureFire X300U compatibility, so fit is intentionally specific rather than broad.

Suggested Comparisons

Duty holsters for red dot-equipped pistols
Open-top retention holsters
Mid-ride belt holsters
Right-hand holsters

Suggested Accessories

Holster belt
Red dot sight
Weapon light
Duty belt

Frequently Asked Questions

Is this holster made for a pistol with a red dot sight?

Yes. The 6390RDS is specifically designed for firearms with red dot sights mounted to them.

What retention system does it use?

It uses Safariland’s Automatic Locking System (ALS), an internal locking device that retains the weapon in all directions without straps or snaps to manipulate.

How is the draw released?

The holster is thumb-operated. Once the ALS is deactivated, the draw is a simple straight-up motion.

What handgun and setup does this holster fit?

The listed firearm fit is Glock 17 MOS Gen 3-4, and the title also notes compatibility with a SureFire X300U.

Is this a right- or left-hand holster, and how does it ride?

This is a right-hand holster. It features a mid-ride belt loop and is described as riding close to the body.