Brand: Kinetic Development Group
Model: MREX20 XL
Firearm Fit: FN SCAR 20S
Top Rail: Step-down M-LOK design
Attachment Style: Modular receiver/chassis system; a drop-in upgrade that replaces factory side and bottom rails
Attachment Positions: M-LOK slots at the 2, 3, 6, 9, and 10 o'clock positions; includes 2 additional M-LOK slots forward of the standard MREX20
Material: Machined 6061-T6 Aircraft-Grade Aluminum
Finish: Non-Infrared Reflective (NIR) Cerakote (Black)
Length: 16.125 inches; extends 3.5 inches further than the standard MREX20
Weight: 8.0 oz
Inside Diameter: Optimized for the heavy barrel profile of the SCAR 20S
Outside Diameter: Slim, ergonomic profile with a flat base for shooting from bags or barricades
Includes: MREX20 XL rail, two mounting bridges, hardware kit, T25 Torx wrench, and thread-locking compound

Features

The KDG FN SCAR 20S Rail – MREX20 XL is an extended modular handguard system engineered to maximize the performance, stability, and adaptability of the FN SCAR 20S platform. As part of KDG’s advanced MREX MkII lineup, this XL variant is purpose-built for long-range shooters who demand increased rail space and enhanced shooting ergonomics. Constructed from 6061-T6 aircraft-grade aluminum with a non-reflective Cerakote finish, the MREX20 XL delivers a lightweight yet highly durable chassis upgrade. Its extended design adds approximately 3.5 inches of forward length, providing additional real estate and two extra M-LOK slots for mounting bipods, lasers, and other accessories. Designed with precision shooting in mind, the rail features a flat bottom profile for improved barricade and bag support, along with a step-down nose for better laser and optic clearance. A reinforced dual-bridge structure enhances rigidity, creating a rock-solid platform for optics and accessories that helps improve consistency and accuracy at extended distances. Purpose-built for FN SCAR 20S rifles in calibers like .308 Win and 6.5 Creedmoor, the MREX20 XL transforms the rifle into a more capable precision system—ideal for shooters looking to increase modularity, stability, and long-range performance.

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