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Questions & Answers
So is it 2 day air shipping or 1 to 4 months? Your website says both. Expert Answer

It will depend on what model Kinetic Development Group Scar Mrex Mark II M-LOK Handguard you select. Please email us at techsales@opticsplanet.com for more information.

by Hunter, Gear Expert, September 21, 2022
Customer Reviews
Expert Review
Superb Scar Upgrade by Andrew, Gear Expert, March 14, 2023
Added the 4.25 inch MREX to my Scar 17 and it's the perfect fit. It's the right amount of additional rail space without being too front-heavy. Installation was a lot easier than I thought it would be. One thing to keep in mind is that there is a moun...
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2/2 found this helpful
Helpful Positive Review love this handgaurd by Hayden, Verified Owner, March 25, 2021
Best hang guard for the scar out there. A bit difficult to install. I had to get a blow torch for the lock on the scar barrel. How ever it was completely worth it. Looks amazing and feels better. Finally no more crappy rails on the side.
2/2 found this helpful
Helpful Positive Review PACKAGING ISSUES by Jollyrodger, Verified Owner, February 14, 2024
Handguard arrived with screws, no lock tight, no instructions the bigger issue is the giant optics planet sign on the outside of the box. Box arrived had been clearing torn open not damaged during shipping and the tape that closes the handguard box ...
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1/1 found this helpful
Helpful Positive Review KDG Mrex Mark II M-Lok rail by Big Rob, December 18, 2020
Fantastic rail for the SCAR 17. I’ve always loved my SCAR, but the platform doesn’t offer much in the way of accessory mounting options. This rail really opens up the rifle to a lot of different configurations. Plus, it looks awesome and it’s extreme...
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2/2 found this helpful
Helpful Positive Review Scar Mrex Mark II M-LOK Handguard by Extended Rail, November 6, 2021
Great product for extending your rail. Looks nice and is well made. Item light weight and takes about 20ish minutes to install only with the tools included. Instructions don’t address an internal barrel bridge in the receiver. I needed to contact the...
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1/1 found this helpful
Helpful Positive Review Great additon to the SCAR by Duke, Verified Owner, November 2, 2022
Purchased 2 of these bad boys. One for my SCAR 16 and one for the 17 and I am very happy that I did so. The quad rail of the SCAR is ugly, uncomfortable, and quite frankly obsolete. This rail extension is very ascetically pleasing and functional. Add...
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1/1 found this helpful
Read All 13 Reviews
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Product Info for Kinetic Development Group Scar Mrex Mark II M-LOK Handguard

There are a few obvious differences/updates from the original MREX. M-Lok slots are present in more locations than the previous model, spanning the entire length of the MREX MKII. M-Lok has been added to the 2 oclock and 10 oclock position as a new mounting location and shield from the gas block. The MKII has the desired step down forward of the front folding sight like the MREX, but no picatinny. The traditional picatinny in this 12 oclock position has been replaced with M-Lok slots allowing for more mounting options. The MKII will be offered in three different lengths instead of two. The lengths available will be the MKII 6.5, 4.25, and 2.2. These designations signify the length the MREX MKII extends (in inches) beyond the SCAR upper receiver. The 6.5in length is the ideal full size rail extension, same as its predecessor (MREX M-Lok 6.5). We have updated the MREX M-Lok 4.9 (Mid-length) to an overall length of 4.25in to accommodate the needs of issued rifle users. This length is ideal for use on a SCAR MK17 with a 13in barrel and issued FNH suppressor. Finally, the MKII 2.2 is ideal for use with a SCAR 16 10in SBR configurations, or any SCAR user looking to add M-Lok to their rifle without having a rail that extends beyond the gas block. All versions of the SCAR MREX MKII will be available in Type III hard coat anodized black and Magpul Flat Dark Earth Cerakote. Like the original MREX there is no weight penalty by adding the MREX MK II to your SCAR. The MKII rails are easier to install with less hardware in unnecessary locations. Like the original MREX, once installed on your barrel assembly, the MREX MKII can stay attached to the barrel, allowing easier change to configuration.image

Specifications for Kinetic Development Group Scar Mrex Mark II M-LOK Handguard:

Manufacturer: Kinetic Development Group
Finish: Cerakote
Fabric/Material: Aluminum Alloy
Gun Type: Rifle
Gun Rail: M-LOK
Condition: New
Included Accessories: Standard
Height: 6.5 in
Quantity: 1

Features of Kinetic Development Group Scar Mrex Mark II Handguard

  • Material: 6061-T6 Aluminum
  • M-LOK modular system the entire length of the extension
  • Hardcoat anodized
  • Drop M-Lok 12 oclock position for mounting of laser and light devices
  • Picatinny Rails NOT Included

Package Contents:

  • Kinetic Development Group Scar Mrex Mark II M-LOK Handguard

Kinetic Development Group Scar Mrex Mark II M-LOK Handguard Orderable Models

List of Orderable Models

Kinetic Development Group Scar Mrex Mark II M-LOK Rail, Black, 2.2in, MRX5-MK2-040 , MPN: MRX5-MK2-040 , UPC: 851064007760 , Code: 2A4-HZ-SCIIR-MRX5-MK2-040
Kinetic Development Group Scar Mrex Mark II M-LOK Rail, FDE, 6.5in, MRX5-MK2-120 , MPN: MRX5-MK2-120 , UPC: 851064007739 , Code: 2A4-HZ-SCIIR-MRX5-MK2-120
Kinetic Development Group Scar Mrex Mark II M-LOK Rail, FDE, 4.25in, MRX5-MK2-130 , MPN: MRX5-MK2-130 , UPC: 851064007753 , Code: 2A4-HZ-SCIIR-MRX5-MK2-130
Kinetic Development Group Scar Mrex Mark II M-LOK Rail, Black, 4.25in, MRX5-MK2-030 , MPN: MRX5-MK2-030 , UPC: 851064007746 , Code: 2A4-HZ-SCIIR-MRX5-MK2-030
Kinetic Development Group Scar Mrex Mark II M-LOK Rail, FDE, 2.2in, MRX5-MK2-140 , MPN: MRX5-MK2-140 , UPC: 851064007777 , Code: 2A4-HZ-SCIIR-MRX5-MK2-140
Kinetic Development Group Scar Mrex Mark II M-LOK Rail, Black, 6.5in, MRX5-MK2-020 , MPN: MRX5-MK2-020 , UPC: 3052112 , Code: 2A4-HZ-SCIIR-MRX5-MK2-020

Kinetic Development Group Scar Mrex Mark II M-LOK Handguard Unavailable & Discontinued Models

List of Unorderable Models

USED, Kinetic Development Group Scar Mrex Mark II M-LOK Rail, Black, 4.25in, MRX5-MK2-030 , MPN: MRX5-MK2-030-EDEMO , Code: 2A4-HZ-SCIIR-MRX5-MK2-030-EDEMO-SC-C
USED Kinetic Development Group Scar Mrex Mark II M-LOK Rail, FDE, 6.5in, MRX5-MK2-120, EDEMO1, Used, Condition Fair , MPN: MRX5-MK2-120-EDEMO1 , Code: 2A4-HZ-SCIIR-MRX5-MK2-120-EDEMO1
DEMO, Kinetic Development Group Scar Mrex Mark II M-LOK Rail, Black, 6.5in, MRX5-MK2-020 , MPN: MRX5-MK2-020-DEMO , Code: 2A4-HZ-SCIIR-MRX5-MK2-020-DEMO
USED Kinetic Development Group Scar Mrex Mark II M-LOK Rail, FDE, 6.5in, MRX5-MK2-120, EDEMO2, Condition Parts Only/Salvage, Defective , MPN: MRX5-MK2-120-EDEMO2 , Code: 2A4-HZ-SCIIR-MRX5-MK2-120-EDEMO-DF-F
DEMO, Kinetic Development Group Scar Mrex Mark II M-LOK Rail, Black, 4.25in, MRX5-MK2-030 , MPN: MRX5-MK2-030-DEMO , Code: 2A4-HZ-SCIIR-MRX5-MK2-030-DEMO
USED Kinetic Development Group Scar Mrex Mark II M-LOK Rail, FDE, 6.5in, MRX5-MK2-120, EDEMO3, Used, Condition Good , MPN: MRX5-MK2-120-EDEMO3 , Code: 2A4-HZ-SCIIR-MRX5-MK2-120-EDEMO3
DEMO, Kinetic Development Group Scar Mrex Mark II M-LOK Rail, FDE, 4.25in, MRX5-MK2-130 , MPN: MRX5-MK2-130-DEMO , Code: 2A4-HZ-SCIIR-MRX5-MK2-130-DEMO
DEMO, Kinetic Development Group Scar Mrex Mark II M-LOK Rail, FDE, 6.5in, MRX5-MK2-120 , MPN: MRX5-MK2-120-DEMO , Code: 2A4-HZ-SCIIR-MRX5-MK2-120-DEMO
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