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Product Details

Parker Mountain Machine is proud to now offer the PMM MRE HD XL Rail Extension ( MLOK Heavy Duty Rail Extension 4″ long Rail) for both the SCAR 16/17 Weapon systems.  

Based off of the PMM MRE rail extension the PMM MRE  HD XL is a 4″ long version of the 2″ MRE & MRE HD

The MRE HD XL has been CNC’d in-house out of T6-6061 aluminum  then hardcoated per military standards.  The PMM  MRE HD XL is a low Profile and lightweight solution to mounting mission essential accessories on the SCAR 16/17.  The MRE HD XL is designed to compliment the PMM MLOK-HD Rail Panels, REP HD Panels & PMM MLOK Lower rail, which have also been redesigned to add additional durability in high-stress environments.

By adding a 4″ of rail extension to their standard or   SBR length SCAR, a shooter gains the much needed space to extend their support hand while still maintaining access to the SCAR’s gas block.

Product Features:

  • 1x PMM MLOK Rail Extension (MRE HD XL) in either  Black or FDE  8625 type 3 class 2 industry standard hardcoat.
  • PMM MRE HD XL maintains a fully free-floated barrel when installed.
  • Limited Lifetime Warranty.
  • Installation is simple using the factory intended front receiver “horseshoe” Carrier”Rail Mounting points.
  • PMM MRE-XL installs in minutes with no permanent weapon modification.
  • Ultra lite weight/Low Profile design.
  • All  PMM MRE HD XL’s will work with any Magpul Designed MLOK Accessory or Mlok “T” slot Style Mounting system as well as the Kinetic Development Rail sections.
  • PMM MRE HD XL weighs only 4.4 oz and maintain the same lines of the PMM MLOK Lower and MLOK-HD side Rails.
  • PMM MRE HD XL allows for full service of the gas system as well as removal of the Barrel as the factory intended it.
  • PMM MRE HD XL can be used with or without the Optimal Bridge cover plate


Download PDF pmm_scar_mre-kre-pre_instalation_instructions.pdf

Additional information

Weight .3 lbs
Dimensions 5 × 2 × 3 in

Black – HD, FDE – HD

2 reviews for PMM SCAR 16/17 MRE HD XL

  1. Eddie Moniet

    Excellent fit and finish. Great Job PMM! My 17 is all decked out in PMM parts and love all of them.

  2. Victor A.

    Beautiful machining, perfect fit in my Scar17s.

    You do have to remove the barrel.

    I used a soldering iron to apply heat to the screw heads to avoid stripping.

    I had to redo the torquing because the accuracy changed big time. Now it’s back to its old self.

    I’m liking this extension, might do it for my 16s.

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