Brand: Kinetic Development Group
Model: MREX20 XL
Firearm Fit: FN SCAR 20S
Top Rail: M-LOK Step-Down; replaces the 12 o’clock Picatinny rail forward of the receiver with a lower-profile M-LOK surface
Attachment Style: Receiver/Chassis upgrade; replaces factory side and bottom rails for a more ergonomic, monolithic feel
Attachment Positions: M-LOK slots at 2, 3, 6, 9, and 10 o’clock positions; features two integrated QD sling swivel points
Material: Machined 6061-T6 Aircraft-Grade Aluminum
Finish: Non-Infrared Reflective (NIR) Cerakote (FDE)
Length: 16.125 inches (overall); extends 3.5 inches further than the standard MREX20
Weight: 8.0 oz (rail only)
Inside Diameter: Specifically contoured for the heavy SCAR 20S barrel profile
Outside Diameter: Slim, ergonomic "hand-friendly" profile with a flat bottom for stability
Includes: MREX20 XL rail, dual mounting bridges, hardware kit, T25 Torx wrench, and thread-locking compound

Features

The KDG FN SCAR 20S Rail – MREX20 XL is a premium extended modular handguard system designed to elevate the performance, ergonomics, and adaptability of the FN SCAR 20S platform. Built as part of KDG’s advanced MREX MkII lineup, this XL variant provides additional rail space and enhanced structural rigidity for precision shooting applications. Constructed from 6061-T6 aircraft-grade aluminum with a non-infrared reflective Cerakote finish, the MREX20 XL delivers a strong yet lightweight upgrade that withstands demanding conditions. Its extended design adds approximately 3.5 inches of forward length and incorporates two additional M-LOK slots, giving shooters more flexibility for mounting bipods, lasers, and other accessories. Engineered with input from long-range shooters and professionals, the rail features a flat bottom profile for improved stability on bags and barricades, along with a step-down front section for better clearance of optics and laser devices. A reinforced dual-bridge construction enhances overall rigidity, creating a rock-solid platform that promotes consistency and accuracy at extended distances. Designed specifically for the FN SCAR 20S, the MRX5-MK2-160 (FDE configuration) offers a seamless fit and expanded modularity, making it an ideal upgrade for shooters looking to maximize precision, control, and accessory capability in a long-range rifle setup.

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