Description
The Geissele Super Modular Rail (SMR) Mk4 is a robust M-LOK handguard engineered for AR-platform rifles. This 10.5 inch model uses hardcoat anodized aluminum construction and features Magpul’s M-LOK interface at the 3, 6, and 9 o’clock positions plus additional M-LOK points toward the rear. The top rail provides a continuous Picatinny section for optics and sighting while forward-mounted M1913 sections offer space for lights, grips, and other accessories.
Key Specifications
- The model is Super Modular Rail Mk4.
- The length is 10.5 inches.
- The material is Aluminum.
- The finish is Hardcoat Anodized.
- The mounting interface is M-LOK with integrated M1913 Picatinny segments at the fore of the 3, 6, and 9 o’clock positions.
- The color is Black.
- The product type is Handguard.
- Designed for the AR-15 platform.
- The profile features maximum venting to reduce weight while maintaining rigidity.
Built to provide a stable, lightweight platform for optics and accessories, the SMR Mk4 10.5in M-LOK offers broad customization without excess bulk. Its combination of a continuous top Picatinny rail, forward Picatinny sections, and extensive M-LOK attachment points makes outfitting an AR-15 straightforward for range, competition, or general service builds.







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