Geissele Automatics Super Modular Rail MK4 M-LOK 13.5" - Black Now Available at BattleHawk Armory - Ultra-Lightweight, Dependable, and Versatile The Geissele Automatics Super Modular Rail (SMR) MK4 is an ultra-lightweight M-LOKA(R) handguard purpose-built to handle intense heat and extended firing sessions without compromising reliability. Featuring M-LOK slots at the 3, 6, 9, and upper 45-degree quadrants, this 13.5-inch rail allows for maximum heat dissipation, reduced weight, and extensive mounting versatility. Developed with Geissele's proprietary 2.25" long barrel nut, the SMR MK4 ensures a solid interface for superior accuracy and consistent zero retention. Key Features 13.5" Lightweight Handguard Ideal for mid-length or rifle-length builds, balancing coverage and minimal added weight. Robust M-LOK Mounting M-LOK at the 3, 6, 9, and upper 45-degree positions for customizable accessory placement. Integrated short M1913 Picatinny rail sections at the fore in the 3, 6, 9 o'clock spots. Proprietary 2.25" Barrel Nut Expanded contact area secures the rail firmly to the receiver. Maintains a true, straight alignment even through multiple disassemblies and reassemblies. Maximum Heat Dissipation Generous venting design ensures cooler operation during high-volume firing. Maintains strength and rigidity while keeping weight low. High-Grade Construction Precision-machined for optimal performance under demanding conditions. Requires Geissele barrel nut wrench (sold separately) for installation. Specifications Manufacturer: Geissele Automatics Model: MK4 Super Modular Rail Type: Free-Float M-LOK Handguard Length: 13.5" Height: 2.4" Inner Diameter: 1.35" Outer Diameter: 2.11" Weight (with Hardware): 13.5 oz Color: Black (Anodized Finish) Included: Barrel Nut (Barrel Nut Wrench Sold Separately) Gas Block: Not Included UPC: 854014005717 MPN: 05-278B Why Choose the Geissele SMR MK4? Ultra-Light & Rigid - Perfect for maximizing maneuverability without sacrificing stability. Enhanced Accessory Integration - M-LOK slots plus integrated Picatinny rails meet a variety of mission or range needs. Secured Accuracy - Extended barrel nut ensures consistently aligned free-float rail for improved shot placement. Trustworthy Design - Geissele Automatics is known for producing premium, duty-proven components. Elevate your AR build with the Geissele Automatics Super Modular Rail MK4 M-LOK 13.5". Order now at BattleHawk Armory and experience top-tier reliability and performance.