Build KitsArisaka DefenseSold by Brownells

Arisaka Defense

Low Profile Picatinny Rail - M-Lok Low Profile 3 Slot 1.37 Black

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

Low-profile Picatinny

Rail designed to reduce bulk

5 Picatinny

Attachment slots for accessory mounting

Measures 2.15

Inches long in the 5-slot

Sits 0.277

Inches above the mounting surface

Uses Bcm

Reverse-threaded KeyMod screws to spread

$27.00
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SKU: 100028939

Overview

This low-profile rail is designed to give KeyMod setups a compact Picatinny mounting section without adding unnecessary bulk. It is intended for hunters and shooters who want accessories positioned close to the handguard for a cleaner, less obtrusive setup. The 5-slot layout provides a practical mounting area, while the minimal height helps preserve a streamlined profile. Finished in black and built from 6061-T6 aluminum, it suits users looking for a lightweight, purpose-built rail section for compatible handguards.

Why Hunters Choose the Arisaka Defense

Low-profile Design

Keeps accessories close to the

Five Picatinny

Attachment slots for accessory mounting

Uses Bcm

Reverse-threaded KeyMod screws to spread

Lightweight 6061

T-6 aluminum construction

Black Finish

Matches a low-visibility setup

Key Features

  • Low-profile Picatinny rail designed to reduce bulk on KeyMod setups.
  • Provides 5 Picatinny attachment slots for accessory mounting.
  • Measures 2.15 inches long in the 5-slot model.
  • Sits 0.277 inches above the mounting surface to keep accessories close to the handguard.
  • Uses BCM reverse-threaded KeyMod screws to spread load across more KeyMod slots.
  • Constructed from 6061-T6 aluminum in black finish.

Best Used For

  • Hunters mounting Picatinny accessories close to the handguard on KeyMod setups
  • Users wanting a low-profile rail section that reduces bulk on modular rifle builds
  • Shooters attaching larger Picatinny accessories across multiple KeyMod slots
  • Those building a streamlined rifle setup where added height is a concern

Specifications

ColorBlack
CompatibilityKeyMod to Picatinny rail adapters
Construction Material6061 T-6 Aluminum
FitsKeyMod
Height Above Mounting Surface0.277 in
Length2.15 in
Mounting ScrewsBCM reverse threaded KeyMod screws
Picatinny Attachment Slots5
Weight0.6 oz

Pros

  • Low-profile design keeps accessories close to the handguard.
  • Provides five Picatinny attachment slots for accessory mounting.
  • Uses BCM reverse-threaded KeyMod screws to spread load across more slots.
  • Lightweight 6061 T-6 aluminum construction.
  • Black finish matches a low-visibility setup.

Considerations & Trade-offs

  • This is a KeyMod-compatible rail section, so it is not a fit for M-Lok handguards despite the title text.
  • The low-profile design keeps accessories closer to the handguard, but that also means less rail height than some users may prefer for larger or bulkier accessories.
  • It provides 5 Picatinny attachment slots, so it is intended for compact accessory mounting rather than longer rail setups.
  • Installation depends on BCM reverse-threaded KeyMod screws, which may matter if you are trying to match existing hardware or spare parts.

Suggested Comparisons

  • Picatinny rail adapters
  • KeyMod handguard accessories
  • Low-profile accessory mounting solutions
  • M-LOK rail sections

Suggested Accessories

  • KeyMod rail adapter
  • Picatinny accessory mount
  • Rail covers
  • Weapon light mount

Frequently Asked Questions

What mounting system does this rail fit?

According to the product data, this rail fits KeyMod.

How many Picatinny slots does it provide?

The long description states it provides 5 Picatinny attachment slots.

What is the finish or color?

The listed color is black.

What material is it made from?

The specifications list 6061 T-6 aluminum construction.

How much does it weigh?

The provided weight is 0.6 oz.