Picture of Geissele Automatics MK4, Super Modular Rail, Handguard, 15", M-LOK, Barrel Nut Wrench Sold Separately (GEI-02-243), Gas Block Not Included, Desert Dirt Color, Product Finishes, Shade Variations and Other Imperfections Are Normal Due to the Manufacturing Process 05-315S
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Geissele Automatics MK4, Super Modular Rail, Handguard, 15", M-LOK, Barrel Nut Wrench Sold Separately (GEI-02-243), Gas Block Not Included, Desert Dirt Color, Product Finishes, Shade Variations and Other Imperfections Are Normal Due to the Manufacturing Process 05-315S

Manufacturer: Geissele Automatics
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SKU: 900366
Manufacturer part number: 05-315S
UPC: 854014005748
Availability: 13 in stock
Old price: $357.00
$332.49
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Geissele Automatics MK4 Super Modular Rail Handguard – 15" M-LOK – Desert Dirt

Geissele Automatics MK4 Super Modular Rail Handguard – 15" M-LOK (Desert Dirt)

The Geissele Automatics MK4 Super Modular Rail Handguard delivers unmatched precision, durability, and customization for modern sporting rifles. Engineered with a 15‑inch barrel‑nut interface and a full‑length M‑LOK rail system, this handguard provides a solid platform for optics, lights, grips, and accessories while maintaining a lightweight profile. Finished in a rugged Desert Dirt camo, it blends seamlessly with tactical gear and field environments.

Key Features & Benefits

  • Super Modular M‑LOK Rail System: Fully integrated M‑LOK slots along the top, sides, and bottom for unlimited accessory options.
  • 15‑Inch Length (Barrel Nut Interface): Perfect for 14.5‑15.5 in barrel lengths, ensuring optimal balance and handling.
  • Lightweight Aluminum Construction: CNC‑machined 7075‑T6 aluminum provides strength without excess weight.
  • Desert Dirt Finish: Durable matte coating designed to resist corrosion, wear, and UV exposure.
  • Easy Installation: Comes with a pre‑drilled barrel nut interface; the required barrel nut wrench (GEI‑02‑243) is sold separately.
  • Compatibility: Works flawlessly with Geissele MK4 receivers, AR‑15/M4 platforms, and other standard M‑LOK compatible rifles.
  • Precision‑Engineered Tolerances: Guarantees a tight, repeatable fit that maintains zero on optics.
  • Manufacturing Variations: Minor shade variations and surface imperfections are natural results of the high‑quality CNC process.

Technical Specifications

Product NameGeissele Automatics MK4 Super Modular Rail Handguard
Model05‑315S
Length15 inches (Barrel‑nut interface)
Rail SystemM‑LOK (Top, Bottom, 12‑Slot Sides)
Material7075‑T6 Aluminum
FinishDesert Dirt (Matte Camo)
UPC854014005748
Included AccessoriesHandguard only – Barrel Nut Wrench (GEI‑02‑243) sold separately, Gas Block not included
Weight~0.75 lb (0.34 kg)
CompatibilityAR‑15/M4 platforms, Geissele MK4 receivers, any rifle with standard M‑LOK mounting points
Finish NotesShade variations and minor surface imperfections are normal due to the CNC manufacturing process.

Ideal Uses & Applications

Whether you are a competitive shooter, tactical operator, or an outdoor enthusiast, the MK4 Super Modular Rail Handguard adapts to any scenario:

  • Precision shooting competitions – maintain zero while adding lasers, lights, and optics.
  • Tactical law‑enforcement and military applications – rapid accessory changes on the battlefield.
  • Hunting and survival – robust construction stands up to harsh environments.
  • Custom builds – the M‑LOK interface allows for creative accessory placements and ergonomic improvements.

Installation Overview

  1. Ensure the rifle is unloaded and the bolt is removed.
  2. Align the handguard’s barrel‑nut interface with the rifle’s barrel nut.
  3. Secure the handguard using the appropriate barrel nut wrench (sold separately).
  4. Attach M‑LOK accessories as needed, tightening each mount to the recommended torque.
  5. Double‑check the alignment of optics and verify zero after installation.

Note: A gas block is not included and must be purchased separately if required for a direct‑impingement system.

Why Choose the Geissele MK4 Super Modular Rail Handguard?

When searching for a high‑quality M‑LOK handguard, the Geissele MK4 stands out for its combination of strength, lightweight design, and modular flexibility. The Desert Dirt finish provides an additional layer of camouflage, making it a favorite among operators who demand both performance and stealth. With Geissele’s reputation for precision engineering, you can trust that this handguard will deliver consistent performance shot after shot.

Upgrade your rifle today with the Geissele MK4 Super Modular Rail Handguard – 15" M‑LOK and experience a new level of customization, reliability, and tactical advantage.

Product Code: 05‑315S | UPC: 854014005748

© Geissele Automatics – All Rights Reserved.

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ManufacturerGeissele Automatics
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CategoryParts
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