Safariland 6378RDS ALS Holster Glock 17 MOS Gen5 w/ SureFire X300U

The Safariland 6378RDS832131 ALS holster delivers secure retention and rapid deployment for Glock 17 MOS Gen5 pistols equipped with SureFire X300U weapon lights. This paddle holster combines Automatic Locking System technology with precise molding to accommodate red dot optics without compromise.

What Makes This Different

The ALS (Automatic Locking System) secures the firearm upon holstering and releases with natural thumb movement during the draw stroke. Unlike traditional retention holsters that rely on tension screws or thumb breaks, the ALS mechanism operates intuitively while maintaining consistent retention force. The RDS designation indicates specific accommodation for red dot sights, eliminating the sight interference common with standard holster designs.

Key Features

• Automatic Locking System (ALS) provides Level II retention without manual safety releases
• SafariLaminate construction resists impacts, chemicals, and temperature extremes
• Accommodates Glock 17 MOS Gen5 with mounted SureFire X300U tactical light
• RDS-compatible design clears popular red dot optics including Trijicon RMR and Leupold DeltaPoint
• Paddle attachment system allows rapid on/off capability without belt removal
• Suede lining protects firearm finish during holstering and drawing
• Right-hand configuration with adjustable cant for optimal draw angle

Field performance centers on the balance between security and accessibility. The ALS mechanism engages automatically when the pistol seats fully, requiring deliberate thumb pressure on the release during draw initiation. This system functions reliably in adverse conditions including mud, sand, and water exposure. Competition shooters and law enforcement personnel rely on the consistent release timing for rapid target engagement.

Technical Specs

• Fits: Glock 17 MOS Gen5 with SureFire X300U weapon light
• Material: SafariLaminate thermoplastic construction
• Retention: Level II ALS (Automatic Locking System)
• Mounting: Paddle attachment with adjustable cant
• Hand orientation: Right-hand draw
• Color: Black finish
• Weight: Approximately 4.2 ounces
• Country of origin: United States

This holster addresses the specific challenge of carrying optics-equipped pistols with weapon-mounted lights while maintaining quick access. The engineered fit eliminates movement and noise during carry, while the proven ALS system provides security without complicated manipulation sequences.