The Kinetic Development Group MREX MKII Rail (KDG part no. MRX5-MK2-030) is an M-LOK handguard built specifically for the FN SCAR platform. This 4.25 rail-length variant measures 11.08 inches overall and gives SCAR owners a full-length M-LOK mounting surface for lights, grips, and other accessories without the bulk of a quad-rail system. Finished in black, it is built to KDG’s known standard for SCAR handguards, a favorite among owners looking to modernize the rifle’s accessory-mounting options. For FN SCAR shooters who want a slimmer, M-LOK-based rail system, this handguard from Kinetic Development Group is a direct-fit upgrade.

Key Specifications

• Built specifically for the FN SCAR platform.
• Part of KDG’s MREX MKII (Modular Rail Extension Mark II) rail system.
• Uses M-LOK slots for mounting accessories.
• This is the 4.25 rail-length variant.
• Measures 11.08 inches overall.
• Finished in black.
• Machined from 6061-T6 aluminum with a Type III hard-coat anodized finish.
• Free-float design with M-LOK slots at the 3, 6, and 9 o’clock positions.
• Includes two Picatinny rail sections for accessories that require a rail interface.
• Ships with a pre-installed mounting bridge for simplified installation.

Frequently Asked Questions

What rifle does this rail fit? The FN SCAR platform.

What accessory mounting system does it use? M-LOK slots along the full length of the rail.

How long is this rail? This is the 4.25 length variant, measuring 11.08 inches overall.

Buy the KDG MREX MKII M-LOK Rail for FN SCAR

Slim down and modernize your SCAR’s accessory rail. Order the KDG MREX MKII Rail from our gun parts selection at our Lubbock, Texas gun shop, with fast shipping to your door.