Flashlights & AccessoriesArisaka DefenseSold by Brownells

Arisaka Defense

Offset Scout Mount - Geissele Smr 416 Offset Scout Mount

Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.

Surefire M300

M600 Scout lights

Compatible Arisaka

Arisaka 300 and 600 series

Also Fits

Streamlight Protac Rail Mount 1,

Positions Light

At the 45-degree angle

Replaces Factory

A low-profile offset mount

$65.00
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SKU: 100040415

Overview

Built for KeyMod setups that need a compact light placement, this offset mount positions a Scout-style light at a 45-degree angle while keeping the profile low. It is designed for Surefire M300 and M600 Scout lights, and it also works with Arisaka 300 and 600 series lights plus Streamlight Protac Rail Mount 1, 2, and HL-X models. By replacing the factory Picatinny adaptor, it offers a streamlined mounting option for rifles where space and light placement matter. The mount is finished in black and uses 6061 T-6 aluminum construction.

Why Hunters Choose the Arisaka Defense

Mounting Scout-style

Lights at a 45-degree position

Compatible M300

M300 and M600 Surefire Scout

Also Fits

Arisaka 300 and 600 series

Compatible Streamlight

Streamlight Protac Rail Mount 1,

Low-profile Offset

Design replaces the factory Picatinny

Key Features

  • Designed for Surefire M300 and M600 Scout lights
  • Compatible with Arisaka 300 and 600 series lights
  • Also fits Streamlight Protac Rail Mount 1, 2, and HL-X lights
  • Positions a light at the 45-degree angle
  • Replaces the factory Picatinny adaptor with a low-profile offset mount
  • Fits KeyMod and comes in black

Best Used For

  • Hunters using KeyMod handguards who want a low-profile 45-degree light mount
  • Users running Surefire Scout M300 or M600 lights on compatible setups
  • Shooters with Arisaka 300 or 600 series lights needing offset mounting
  • Those using Streamlight Protac Rail Mount 1, 2, or HL-X lights on KeyMod
  • Minimalist rifle builders prioritizing compact light placement and reduced bulk

Specifications

ColorBlack
Compatible LightsM300 and M600 Surefire Scout lights; Arisaka 300 and 600 series lights; Streamlight Protac Rail Mount 1, 2, and HL-X lights
Construction Material6061 T-6 Aluminum
Factory Adaptor ReplacementFactory Picatinny adaptor
Length1.265"
Mount Position45-degree position
Mount TypeOffset Scout Mount
Patented FeatureBMC's patented inverted KeyMod screws
Platform CompatibilityKeyMod
Thickness0.20"
Weight0.4 oz

Pros

  • Designed for mounting Scout-style lights at a 45-degree position
  • Compatible with M300 and M600 Surefire Scout lights
  • Also fits Arisaka 300 and 600 series lights
  • Compatible with Streamlight Protac Rail Mount 1, 2, and HL-X lights
  • Low-profile offset design replaces the factory Picatinny adaptor
  • Very lightweight at 0.4 oz and compact at 1.265 inches

Considerations & Trade-offs

  • Designed specifically for KeyMod, so it is not a universal light mount and will not fit other attachment systems without the correct interface.
  • It is intended for Scout-style lights in the M300/M600 pattern and compatible models, so fit depends on the light body and mounting standard.
  • The mount replaces the factory Picatinny adaptor with a low-profile offset setup, which is useful for placement but means it is a dedicated solution rather than a general-purpose adapter.
  • At 0.4 oz and 1.265" long, it is compact, but users should still confirm clearance and 45-degree placement on their setup before installation.

Suggested Comparisons

  • Weapon light mounts
  • KeyMod rail accessories
  • Scout-style weapon lights
  • Low-profile light mounting solutions

Suggested Accessories

  • Weapon light batteries
  • Weapon light pressure switch
  • KeyMod rail accessories
  • Light mounting hardware

Frequently Asked Questions

What lights is this offset mount designed to fit?

It is designed especially for the Surefire M300 and M600 Scout lights. It is also compatible with Arisaka 300 and 600 series lights, plus the Streamlight Protac Rail Mount 1, 2, and HL-X lights.

What mounting system does this product use?

This mount fits KeyMod.

What position does it place the light in?

It is made for a 45-degree offset mounting position.

What does this mount replace?

It replaces the factory Picatinny adaptor with a low-profile offset mounting option.

What specifications are provided for the mount?

The listed specifications are black color, KeyMod fitment, 6061-T-6 aluminum construction, 1.265" length, and 0.4 oz weight.