Arisaka Defense Offset Scout Mount – M-LOK

The Arisaka Defense Offset Scout Mount is one of the most popular upgrades for mounting Scout-style weapon lights on an M-LOK handguard. Designed to replace bulky factory mounts, it positions the light closer to the rifle for improved ergonomics, reduced snag hazards, and a cleaner overall setup.

Its compact design places the light at a natural 45-degree angle, making it easier to activate while keeping your support hand in a comfortable shooting position.

Features

• Low-profile offset Scout light mount for M-LOK handguards
• Three-position lateral adjustment for optimal accessory clearance
• Positions light at a natural 45° angle
• Lightweight 6061-T6 aluminum construction
• MIL-A-8625 Type III hard coat anodized finish
• Precision CNC machined
• Includes mounting hardware
• Made in the USA

Compatible Lights

Designed for Scout-pattern weapon lights, including:

• SureFire M300 & M600 Series
• SureFire Dual Fuel Models
• SureFire Vampire Models
• Modlite PLH, PLHv2 & OKW
• Arisaka 300 & 600 Series Lights
• Streamlight ProTac Rail Mount 1
• Streamlight ProTac Rail Mount 2
• Streamlight ProTac HL-X (Non-Laser)
• Olight Odin
• Cloud Defensive REIN

Adjustable Positioning

Unlike fixed light mounts, the Offset Scout Mount features three lateral mounting positions, allowing approximately 0.240" of adjustment.

This lets you fine-tune the light's position for:

• Front sight clearance
• Laser or IR device clearance
• Pressure switch ergonomics
• Suppressor clearance
• Preferred thumb placement

When mounted to the side of an M-LOK handguard, the light sits at approximately:

• 1:30 or 10:30 position (mount oriented upward)
• 4:30 or 7:30 position (mount oriented downward)

The mount itself measures less than 0.20" thick, helping keep your rifle as slim as possible.

Handguard Compatibility

Compatible with most modern M-LOK handguards, including:

• BCM MCMR
• Knight's Armament URX4
• Geissele SMR MK8
• Geissele SMR MK14
• Geissele SMR MK16

Not Compatible With

• Aero Precision Enhanced Gen 2
• SIG MPX
• SIG MCX Virtus (unless using the suppressor-width handguard)

Specifications

• Material: 6061-T6 Aluminum
• Finish: MIL-A-8625 Type III Hard Coat Anodized
• Length: 1.265"
• Weight: 0.4 oz
• Made in the USA

Recommended Torque

• M-LOK Screws: 30 in-lbs
• Light Body Screws: 20 in-lbs using Loctite 222 or 243

(IP25/T25 and IP20/T20 Torx drivers required for installation and are not included.)

Our Thoughts

When building a rifle, every inch of rail space matters.

The Arisaka Offset Scout Mount does an excellent job of tucking your weapon light in close to the handguard while still providing enough adjustment to work around front sights, lasers, suppressors, or pressure switches.

It's lightweight, incredibly well machined, and one of the cleanest mounting solutions available for Scout-style lights. The three-position adjustment is a feature many shooters don't realize they need until they start adding accessories to their rifle.

If you're looking to build a streamlined, professional-grade rifle, this is one of the best Scout light mounts on the market.

Shipping Information

As a small business committed to keeping prices competitive, OSA operates on a just-in-time inventory model rather than stocking every item in-house.

Please allow 5–7 business days for order processing before shipment.

Thank you for supporting a small business!