Description
The Geissele Super Modular Rail Mk4 Federal is a purpose-built M-LOK handguard designed to deliver a strong, lightweight platform for AR-15 users. This Mk4 Federal rail is the same design used to fulfill Federal Bureau of Investigation contracts, offering integrated Picatinny sections and broad M-LOK compatibility. Maximized venting improves heat dissipation while reducing overall weight. The DDC hardcoat anodized finish provides a durable exterior suited to field use.
Key Specifications
- The handguard is constructed from Aluminum for a balance of strength and reduced weight.
- The finish is Hardcoat Anodized to resist wear and corrosion.
- The length is 10 inches.
- The color is Desert Tan (DDC).
- Designed to fit the AR-15 platform.
- Features M-LOK slots at the 3, 6 and 9 o’clock positions and upper 45-degree quadrants for modular accessory placement.
- Includes integrated M1913 Picatinny sections at the 3, 6 and 9 o’clock positions with an elongated bottom rail for accessory clearance.
- The product model is listed as MK4 Federal.
Built for disciplined operators and serious AR-15 owners, the Mk4 Federal rail blends modularity and durability in a compact 10-inch package. Its M-LOK interface and integrated Picatinny sections let you mount essential accessories while keeping weight and bulk down. If you need a proven, mission-capable handguard with a rugged finish and practical ergonomics, this Geissele Mk4 Federal DDC rail is a pragmatic choice.







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