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Kinetic Development Group

KDG SCAR MREX MkII 6.5 M-LOK Rail

Longest MREX MkII rail for the FN SCAR 16/17, with a 13.34-inch overall length and maximum forward M-LOK space.

Quick Specs

Price
$360
Weight
11 oz
Brand
Kinetic Development Group
Category
handguard

Features

  • 6.5-inch extension; 13.34 inches overall
  • 8.5 oz rail plus 2.5 oz mounting hardware
  • 6061-T6 aluminum
  • Black Type III hardcoat or FDE Cerakote
  • Fits FN SCAR 16 and 17

Capability Boosts

Modularity+2

Recommended For

Duty/Patrol+2
duty+2
Competition+2
customization+2

Where to Buy

Compare current prices and availability from retailers we work with.

Palmetto State Armory

Kinetic Development Group 6.5" SCAR MREX M-Lok MKII Handguard, Black - MRX5-MK2-020

$333.99
Unknown
1d ago
View offer
Kinetic Development Group

KDG FN SCAR Rail - MREX MkII 6.5

$359.98
Unknown
1d ago
View offer

Price History

90-day low $332.98 · at low now
$359.98$332.986/77/229/5

Compatibility Tags

family: modern-riflehandguard: mlokplatform: fn-scar-17splatform: fn-scar-16s

Overview

The factory FN SCAR forend gives you very little to work with: a short top rail and minimal M-LOK real estate, which leaves no good home for a light, laser, bipod, or hand stop where you actually want them. The Kinetic Development Group MREX MkII fixes that. It is an extended M-LOK rail system that replaces the stubby factory section and runs M-LOK slots along the 3, 6, and 9 o'clock positions, giving the SCAR 16 and SCAR 17 the forward mounting length the platform should have shipped with.

This catalog record is the longest 6.5-inch model, not the whole MREX family. It measures 13.34 inches overall and weighs 8.5 ounces plus 2.5 ounces of mounting hardware. The black SKU is MRX5-MK2-020; FDE sibling MRX5-MK2-120 is selected on the same page. KDG sells the 4.25- and 2.2-inch rails on separate pages, so each now has its own catalog identity and route instead of hiding behind one ambiguous family record.

Key Features

  • Extended M-LOK rail for FN SCAR 16/17
  • M-LOK at 3, 6, and 9 o'clock
  • 6.5-inch extension and 13.34-inch overall length
  • Black and FDE Cerakote finishes
  • Preserves SCAR quick-change barrel system

Pros

  • +Adds the forward M-LOK real estate the factory rail lacks
  • +Keeps the SCAR's quick-change barrel functional
  • +Maximum accessory space in the MREX MkII line

Cons

  • Heaviest MREX MkII option at 11 ounces installed
  • Heavier than the 4.25- and 2.2-inch versions
  • SCAR 15P needs the different MREX15 rail, not this one

Detailed Specifications

type
6.5-inch extended M-LOK rail system
overallLength
13.34 inches
weight
8.5 oz rail plus 2.5 oz mounting hardware
finishes
Black, FDE Cerakote
mlok
3, 6, and 9 o'clock
compatibility
FN SCAR 16, SCAR 17 (SCAR 15P uses MREX15)
madeIn
USA

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