6378RDS Holster for GLOCK 34/35 with RDS - Paddle and Belt Loop

In this review the author evaluates the 6378RDS holster built for GLOCK 34 and 35 models equipped with a red dot sight and a Surefire X300U light. The bottom line: this is a purpose-built concealment solution for shooters who need secure retention and protection for optics-equipped pistols while preserving quick access. The review focuses on fit, retention, and real-world use with an emphasis on the holster's ALS locking system and the rotating protective RDS cover that keeps optics safe until the draw.

Key Features

• Model fit: Custom fit for GLOCK 34/35 with Surefire X300U and compatible red dot optics, ensuring the weapon sits correctly every time.
• ALS Locking System: Provides Level 1 mechanical retention so the pistol is secured in the holster until an intentional, smooth release is made.
• Protective RDS cover: The cover automatically rotates away when drawing, protecting the red dot during carry and not interfering with deployment.
• Paddle and belt loop options: A larger flex paddle is included with an optional fully adjustable belt slide that fits 1.5'in to 1.75'in belts for versatile carry mounting.
• Durable construction: Built to withstand regular use and protect optics and weapon surfaces from abrasion and impacts during carry.

Who It's For

This holster is aimed at owners of GLOCK 34 or 35 who run a red dot optic and a Surefire X300U or similar weapon light and who want a balance of concealment and security rather than minimal appendix carry. It suits competitive shooters who train with optics and duty-minded users who require reliable Level 1 retention and protection for the RDS.

Those who should look elsewhere include owners of pistols without a compatible optic or light, or users seeking a minimalist, low-profile Kydex holster without a protective cover. Also consider a different model if your belt is narrower than 1.5'in or you need a dedicated MOLLE or hard-mounted duty rig.

Pros & Cons

Pros

• Excellent retention from the ALS Locking System keeps the pistol secure during movement and holstering.
• Protective RDS cover shields the optic and rotates cleanly out of the way for a fluid draw.
• Includes both a larger flex paddle and an adjustable belt slide for flexible carry options on 1.5'in to 1.75'in belts.
• Fit and construction feel authentic and durable, holding up with repeated use.

Cons

• The holster is specialized for red dot and weapon light combos and is not ideal for pistols without those accessories.
• The larger paddle may be bulkier for strict concealment in very tight clothing choices.

Specifications

Model	6378RDS-6832-131
Fits	GLOCK 34 and GLOCK 35 with RDS and Surefire X300U
Optic compatibility	For use with red dot optic equipped weapons
Mounting	Larger flex paddle with optional adjustable belt slide
Belt slide fit	Fits 1.5'in to 1.75'in belts
Retention	ALS Locking System, Level 1 Security

Our Verdict

The 6378RDS holster is a solid choice for GLOCK 34/35 owners running a red dot and a Surefire light who prioritize secure retention and optic protection. It balances durability, a reliable ALS lock, and flexible mounting options, offering good value for shooters who need a purpose-built concealment holster for optics-equipped pistols.

Frequently Asked Questions

Will this holster fit a pistol without a red dot?
It is designed specifically for pistols with a red dot and Surefire X300U; a non-optic pistol may not seat properly.

What belt widths does the included belt slide accept?
The adjustable belt slide accepts belts from 1.5'in to 1.75'in.

Does the RDS cover interfere with drawing?
No, the protective RDS cover automatically rotates away during the draw to allow a clean presentation.