Geissele Automatics Super Modular Rail MK16 Handguard

The Geissele Automatics Super Modular Rail MK16 is a combat-proven AR-15 handguard developed for the URG-I program and adopted by USASOC for its exceptional rigidity, durability, and reliability under hard use.

Precision machined from 7000-series aluminum and finished in a black hardcoat anodizing or Desert Dirt , the MK16 is engineered to maintain zero and resist flex even with heavy accessory loads. The extended-length Geissele barrel nut increases surface contact with the upper receiver, dramatically improving structural integrity compared to standard AR handguards. Integrated anti-rotation tabs and locking set screws ensure the rail stays locked in place under recoil, impacts, and sustained firing.

A full-length Picatinny top rail provides a continuous mounting surface for optics and iron sights, while seven sides of M-LOK slots allow flexible placement of lights, grips, sling mounts, and mission-specific accessories without unnecessary weight.

Available in 9.3″, 10.5″, and 13.5″ lengths, the MK16 supports a wide range of AR-15 configurations, from compact duty carbines to full-length URG-I-style builds.

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Available Length Options

• 9.3″ – Ideal for short-barrel builds and compact setups

• 10.5″ – Balanced length for carbine and general-purpose rifles

• 13.5″ – Optimized for mid-length gas systems and URG-I configurations

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Key Features

• Multiple Length Options: 9.3″, 10.5″, and 13.5″

• Extended-Length Geissele Barrel Nut – Increased rigidity and reduced flex

• Anti-Rotation Tabs & Set Screws – Prevents rail movement under all conditions

• Full Picatinny Top Rail – Secure mounting for optics and sights

• Seven-Sided M-LOK Interface – Maximum accessory flexibility with reduced weight

• 7000-Series Aluminum Construction – Exceptional strength-to-weight ratio

• Hardcoat Anodized Finish – Corrosion-resistant and duty-ready

• Adopted by USASOC – Proven military performance

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What’s Included

• Geissele MK16 Handguard (selected length)

• Extended-Length Geissele Barrel Nut

• Anti-Rotation Hardware

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Why Choose the MK16?

The MK16 is not a cosmetic rail — it’s a structural upgrade designed for shooters who demand consistency, durability, and real-world performance. Whether you’re cloning a URG-I, building a duty rifle, or assembling a high-end civilian AR-15, the MK16 delivers rock-solid mounting, excellent ergonomics, and proven reliability.