PTS Kinetic - SCAR MREX M-Lok MK2 4.25" Rail - Black

by PTS
SKU KN013490307

The Kinetic MREX™ Modular Receiver Extension is designed to be simple, durable, and lightweight. The slim profile of the MREX greatly improves the aesthetic of the SCAR by giving it a long sleek profile.  

Its extended rail length in front of the front sight/gas block increases the rifle’s modularity by increasing the real estate for accessory attachments as well as improves ergonomics by better accommodating the modern forward support hand rifle hold and improving the overall rifle’s balance.  The MREX’s one piece construction ensures maximum durability without any significant weight penalty.  

Compare with the 4.9” version, M-Lok slots are present in more locations in this 4.25” version, it has been added to the 2 o’clock and 10 o’clock position as a new mounting location and shield from the gas block. The MK2 has the desired step down forward of the front folding sight like the MREX, but no picatinny. The traditional picatinny in this 12 o’clock position has been replaced with M-Lok slots allowing for more mounting options. 


  • Works with VFC / Tokyo Marui SCAR models
  • M-LOK™ modular design
  • Simple, lightweight and highly durable one-piece design
  • Improved rifle balance and weight distribution
  • Better accommodates the modern support hand forward rifle hold
  • Rotation limited QD sockets on each side
  • Additional M-Lok slots in the 2 and 10 o’clock position
  • Traditional picatinny in 12 o’clock position is replaced by M-Lok slots



  • Color – Black
  • Material – 6000 Series Aluminum
  • Dimension – 284 (L) x 55 (W) x 54 (H) mm
  • Weight –  192g (approx.)
  • Compatibility:
    • Cyber Gun SCAR-H (GBB)
    • VFC SCAR-H (AEG & GBB) / L (AEG)
    • Tokyo Marui Recoil Shock SCAR-H / L

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