Description
If you've ever fought your front sight or an accessory for real estate on the top rail, the Arisaka Defense Inline Scout Mount M-LOK is the fix. It swaps out the stock Picatinny adapter on your weapon light and drops the whole setup straight onto an M-LOK handguard, sitting just 0.2 inches above the mounting surface. That's about as flat as an inline mount gets, and it makes a noticeable difference in how clean and snag-free your build feels.
What Makes the Inline Scout Mount Tick
The real trick here is the three-position adjustment. On handguards with 45-degree mounting flats, you can shift the light 0.12 inches to either side of center, which gives you the wiggle room to clear a folding front sight or another accessory without crowding the 12 o'clock rail. It plays nicely with a long list of 45-degree flat handguards including the BCM MCMR, Geissele SMR MK4, MK8 and MK16, Daniel Defense MFR, KAC URX4, ALG Defense EMR, and the Mega/Hodge Wedge Lock, among others.
Built Tough and Made in the USA
Arisaka machines this mount from 7075-T6 aluminum and finishes it with a Type III hard coat anodize, so it shrugs off the abuse a working gun sees. Even with that rugged build it barely tips the scales, keeping your handguard weight down where you want it. It's designed, tested, and made in the United States, and Arisaka backs their gear with a lifetime warranty.
Light Compatibility That Covers the Field
This mount was built with the Surefire Scout M300 and M600 families in mind, but it reaches well beyond that. It works with Modlite PLH, PLHv2 and OKW, a broad spread of Surefire Scout models, the Streamlight ProTac Rail Mount 1, 2 and HL-X (non-laser), Olight Odin, CD REIN, and Arisaka's own 300, 600 and 18650 series bodies. One note worth knowing going in: this mount is meant to sit on the handguard body, not cantilevered off the front end. Pack a T20 or IP20 Torx driver and some thread locker and you'll have it buttoned up in a few minutes.
Key Specifications
- Manufacturer: Arisaka Defense
- Manufacturer Part Number: ISM-M
- UPC: 642049218321
- Color: Black
- Product Type: Weapon Light Mount
- Mounting Interface: M-LOK
- Material: 7075-T6 CNC Machined Aluminum
- Finish: MIL-A-8625 Type III Hard Coat Anodized
- Length: 3.0 in
- Profile Height: 0.20 in at light mounting point
- Weight: 0.6 oz
- Positions: Three, 0.12 in offset to either side of center
- Recommended Torque: 30 in-lbs M-LOK screws, 20 in-lbs light body screws
- Install Tool: T20 or IP20 Torx driver (not included)
- Country of Origin: Made in the USA
What’s Included
- Arisaka Inline Scout Mount M-LOK (black)
- Two M-LOK nuts
- Two 10-24 x 5/16 in Torx button head screws
- Two 8-32 x 3/8 in Torx flat head screws for attaching the light body
Frequently Asked Questions
What lights does the Arisaka Inline Scout Mount M-LOK work with?
It's built for the Surefire Scout M300 and M600 series, plus Modlite PLH, PLHv2 and OKW, Streamlight ProTac Rail Mount 1, 2 and HL-X (non-laser), Olight Odin, CD REIN, and Arisaka 300, 600 and 18650 series light bodies. You'll remove your light's stock Picatinny adapter and bolt the body directly to this mount. A T9 Torx driver is what you'll need to pull that factory Picatinny piece off a Surefire Scout.
How does the Inline Scout Mount help with front sight clearance?
The mount offers three positions with a 0.12 inch offset to either side of center. On handguards with 45-degree mounting flats, that lets you nudge the light closer to or farther from the top rail so a folding front sight or another accessory has room to clear. It's one of the main reasons folks reach for this design over a standard rail section.
Does the Arisaka Inline Scout Mount M-LOK come with everything I need to install it?
It includes the M-LOK nuts and screws to fasten the mount to your handguard, along with the screws to attach the light body. You will need to supply your own T20 or IP20 Torx driver and some thread locker, since neither is included. Arisaka recommends 30 in-lbs on the M-LOK screws and 20 in-lbs on the light body screws.
Can I mount this off the front end of my handguard?
No, this mount is designed to sit on the body of the handguard rather than cantilevered off the muzzle end. If you're after a cantilever setup to reduce barrel or suppressor shadow, Arisaka's Inline Scout Pro Mount is the one built for that. For a standard low-profile install on your rail, this Inline Scout Mount is the right pick.





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