Brand: Kinetic Development Group (KDG)
Model: MREX20 A (FDE)
Firearm Fit: FN SCAR 20S
Top Rail: Full-length Picatinny rail that aligns with the factory upper receiver
Attachment Style: Modular receiver/chassis upgrade; drop-in replacement for factory side and bottom rails
Attachment Positions: M-LOK slots at 3, 6, and 9 o'clock positions; includes integrated RRS-Lock (Arca-Swiss) rail on the bottom
Material: Machined 6061-T6 Aircraft-Grade Aluminum
Finish: Non-Infrared Reflective (NIR) Cerakote (FDE)
Length: 12.875 inches (overall)
Weight: 6.0 oz (rail only); approx. 8.0 oz with hardware
Inside Diameter: Optimized for the heavy SCAR 20S barrel profile
Outside Diameter: Slim, ergonomic profile with a flat bottom for stability
Includes: MREX20 A rail, mounting bridge, hardware kit, T25 Torx wrench, and thread-locking compound

Features

The KDG FN SCAR 20S Rail – MREX20 A is a precision-driven 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 variant integrates enhanced ergonomics with modern mounting solutions tailored for long-range shooting applications. Constructed from 6061-T6 aircraft-grade aluminum with a non-infrared reflective Cerakote finish, the MREX20 A delivers a lightweight yet highly durable upgrade designed to withstand demanding environments. Its reinforced dual-bridge construction increases rigidity, creating a rock-solid platform for optics and accessories—helping improve consistency and accuracy at extended distances. What sets the MREX20 A apart is its integrated Arca Swiss rail system, allowing direct tripod mounting without sacrificing M-LOK compatibility. Paired with Really Right Stuff’s RRS-Lock interface, it provides a secure, repeatable mounting solution ideal for precision shooters and supported firing positions. Designed specifically for FN SCAR 20S rifles in .308 Win and 6.5 Creedmoor, the MREX20 A features a slim, ergonomic profile with a flat-bottom geometry for improved stability on bags and barricades. The MRX5-A-150 (FDE configuration) offers a seamless fit and expanded modularity, making it an ideal upgrade for shooters looking to enhance control, versatility, and long-range performance.

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