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Geissele Automatics Super Modular
California Proposition 65 Warning

This product can expose you to chemicals including lead, known to cause cancer and birth defects. For more info visit P65Warnings.ca.gov.

Geissele Automatics

Super Modular

$400.00
Available California compliant

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

Key Details
Brand Geissele Automatics
Manufacturer Part Number 05-315S
UPC 854014005748
SKU GEI05-315S
Current Stock 15 available
Quantity Updated Apr 24, 2026 9:45 PM
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Purchase Requirements
  • Final availability is confirmed at checkout.
In-Store Pickup Required: All firearm purchases must be picked up at our Beverly Hills location after background check completion.
Product Description

Versatile and innovative, Geissele's MK4 DDC Super Modular Rail is a perfect addition to any AR-platform. It features a full length picatinny rail with more than enough space for optics, iron sights, and clip-on night vision/thermal devices. Additional forward-mounted picatinny rail segments are located in the 3, 6, and 9 o'clock positions, and numerous M-LOK attachment points towards the rear gives the user the user virtually unlimited customization options in terms of tactical lights, lasers, fore-grips, and other accessories.

Features
  • Full-length picatinny rail with additional forward-mounted picatinny rail
  • M-LOK attachment points in the 3, 6, and 9 o'clock positions
  • Venting in the lower 45° quadrants
  • Geissele proprietary 2.25 barrel nut"
Specifications
UPC: 854014005748
Manufacturer: Geissele Automatics
Manufacturer Part #: 05-315S
Model: Super Modular
Model (Alt): MK4
Size: 15"
Type: Handguard