SIG SAUER FOXTROT-MSR Full-Size Rail-Mounted White Light

SIG SAUER FOXTROT-MSR Full-Size Rail-Mounted White Light

The SIG SAUER FOXTROT-MSR Full-Size is a high-output rifle-mounted white light built for users who want a focused beam, flexible controls, and more than one power-source option. This exact black model, manufacturer part number SOFR1FS0, produces 1,350 lumens and 33,000 candela from a compact machined-aluminum body. It is designed for M-LOK and M1913 Picatinny-equipped platforms and includes the mounting interfaces needed for either rail system.

Lumens describe the total amount of light produced, while candela indicates beam intensity. The FOXTROT-MSR combines substantial overall output with 33,000 candela to project a defined white beam beyond immediate indoor distances. That balance makes it useful for identifying objects, navigating dark areas, and illuminating targets during low-light training or professional use.

Integrated and Remote Activation

The light supports two control methods. An integrated tail-cap push button provides direct access at the body, while the included remote tape switch lets the user place activation closer to the support-hand position. The remote switch uses a SureFire-compatible plug, which also gives the system broader compatibility with supported switching accessories. Momentary and latching operation are available, allowing brief illumination or continuous light without holding the control down.

Those options make the FOXTROT-MSR adaptable to different handguard lengths and shooting positions. A short personal-defense platform may favor a compact control layout, while a longer rail can use the remote switch to keep activation within natural reach. Final placement should preserve a secure grip, avoid obstructing sights or moving components, and keep the light clear of excessive muzzle blast.

Dual-Fuel FlexCore Power

SIG SAUER’s FlexCore design allows the full-size FOXTROT-MSR to run on one rechargeable 18650 lithium-ion battery or two CR123A lithium batteries. Two 18650 rechargeable batteries are included with this configuration, so one can be staged as a spare while the other is in service. Runtime is rated at up to 1.5 hours on a single battery under the manufacturer’s test conditions.

Dual-fuel capability is useful when charging access is limited or when standardized CR123A cells are already part of a field kit. Battery life will vary with cell type, condition, temperature, storage history, and use pattern. For dependable performance, inspect batteries and contacts periodically and follow the battery manufacturer’s charging, transport, and storage guidance.

Rugged, Flexible Mounting

The anodized black housing is machined from 6061 aluminum to balance strength with manageable weight. The light measures approximately 5.60 inches long and is Scout Mount compatible. SIG supplies both M-LOK and M1913 Picatinny mounting interfaces, enabling installation on a wide range of compatible handguards without requiring the user to choose a rail-specific version at purchase.

The streamlined full-size body is particularly well suited to rifles, carbines, and compact personal-defense platforms where a durable dedicated white light is preferred over a handheld-only solution. Its single high-output mode keeps operation straightforward: activate the light momentarily when needed or latch it on for continuous illumination.

Key Specifications

• Model: FOXTROT-MSR Full-Size
• Manufacturer part number: SOFR1FS0
• UPC: 798681675050
• Output: 1,350 lumens
• Beam intensity: 33,000 candela
• Beam color: White
• Runtime: Up to 1.5 hours
• Power: One 18650 rechargeable lithium-ion battery or two CR123A batteries
• Activation: Integrated push button and included remote tape switch
• Modes: Momentary and latching
• Mounting: Included M-LOK and M1913 Picatinny interfaces; Scout Mount compatible
• Housing: Machined 6061 aluminum
• Finish: Black anodized
• Overall length: Approximately 5.60 inches

Installation and Use Notes

Confirm that the firearm is unloaded before installation or adjustment. Verify that the selected mounting surface is compatible, follow SIG SAUER’s torque and battery-orientation instructions, and check fasteners after initial use. The FOXTROT-MSR is an illumination tool; safe firearm handling, positive target identification, and compliance with applicable laws remain the user’s responsibility.