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Kinetic Development Group

Kinetic Development Group SCAR MREX M-LOK Short 4.9"

The MREX System, from Kinetic Development Group, is the most innovative SCAR receiver extension ever brought to the market. When designing the MREX (Modular Receiver Extension), KDG designed their product to be lightweight, modular and innovative with excellent ergonomics and functionality.

Only 5 left
Product Name Qty
Kinetic Development Group SCAR MREX M-LOK 4.9"-Black 1
Kinetic Development Group SCAR MREX M-LOK 4.9"-FDE 4

Availability: In stock

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The Kinetic MREX™ Receiver extension provides the solution you’ve been searching for with your SCAR rifle platform. The MREX™ was designed to be a simple, durable, and lightweight. By utilizing a one piece design, the MREX™ maintains extreme durability. The MREX™ also allows for removal of the barrel with the extension still attached, allowing users to still change out there barrel assembly in just a few screws. The overall design puts modularity in the places you want it and need it and no where else; while reducing the profile of the factory SCAR platform. There is no better solution to add to your SCAR.

  •     Works on all 7.62 and 5.56 SCAR models (Minus the 10.5″ SCAR 16 Models)
  •     Black Anodized Finish
  •     Magpul MLOK™ Modular Design
  •     ADDS ONLY 2.5oz to the weight of your SCAR!
  •     Improved rifle balance and weight distribution
  •     4.9″ added modular rail space from front of SCAR receiver, for use with any SCAR L & H barrel configurations. (certain Flash hiders and certain suppressors will not fit.)
  •     2x Uncle Mikes QD Mounting Points
  •     Installation still allows for quick change barrel. (See Tutorial Video)
  •     Full kit includes 2 MAGPUL MLOK™ polymer accessory rails, installation torx wrenches, torx screws and vibratite


Black or FDE

Magpul FDE” Cerakote Finish (*KDG Does not warrant Color Variation in relation to FDE SCARs. SCARs vary in color on the anodized upper receiver. This color was chosen because it is the most consistent with after market FDE accessories from Manufacturers like Magpul*)


  • Material: 6061-T6 Aluminum
  • Finish: Non-Reflective Black Type III Hard-Coat Anodizing
  • Finish: Non-Reflective Clear Type III Hard-Coat Anodizing w/ “Magpul FDE” Cerakote
  • Length: 11.75"
  • Length added: 4.9″ -Ideal for 13″ barreled SCAR-H
  • Weight of full kit: 8.4oz
  • 100% Made in the USA

Additional Info

Additional Info

SKU MRX5-4.9
Manufacturer Kinetic Development Group
Finish No
Barrel Length No
Caliber No
Configuration No
Option No
Gas Length No
Height No
Rail Length No
Mount No
Profile No
Reticle No
Co Witness No
Size No


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