Safariland 6378RDS Holster S&W M&P 4" w/ X300U Light Compatible

The Safariland 6378RDS holster delivers secure retention and rapid deployment for Smith & Wesson M&P pistols equipped with red dot sights and SureFire X300U weapon lights. This ALS (Automatic Locking System) holster combines passive retention with active security mechanisms for professional duty use.

What Makes This Different

Unlike standard holsters that require separate models for different configurations, the 6378RDS accommodates both optics and weapon lights in a single design. The ALS mechanism automatically secures the firearm upon holstering while allowing instant access with proper thumb placement. This dual-compatibility eliminates the need for multiple holsters when switching between configurations.

Key Features

• ALS automatic locking system with straight-up draw motion
• Accommodates red dot optics including Trijicon RMR, Leupold DeltaPoint Pro
• Compatible with SureFire X300U and similar rail-mounted lights
• SafariLaminate construction resists scratches and maintains shape
• Adjustable cant from 0 to 15 degrees forward
• Belt loop fits 1.5" to 1.75" duty belts
• Suede lining protects firearm finish during draws

Field testing demonstrates consistent lock-up and release across temperature ranges from -20°F to 120°F. The holster maintains retention through physical contact scenarios while allowing sub-second draws with proper training. Law enforcement agencies report reliable performance through qualification courses and daily carry rotations.

Technical Specs

• Fits: Smith & Wesson M&P 9mm/.40 S&W 4.25" barrel
• Light compatibility: SureFire X300U, X300U-A, X300U-B
• Construction: SafariLaminate thermoplastic
• Retention: Level II ALS system
• Belt attachment: 1.5" - 1.75" belt loop
• Cant adjustment: 0° to 15° forward
• Weight: 4.2 ounces
• Finish: STX Plain Black
• Country of origin: USA

This holster addresses the specific needs of operators running optic-equipped pistols with weapon lights. The proven ALS system provides security without compromising access speed, while the robust construction handles extended duty cycles.