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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

$350.00
Available California compliant

Geissele Automatics MK8, Super Modular Rail, Handguard, 13.5", M-LOK, Barrel Nut Wrench Sold Separately (GEI-02-243), Gas Block Not Included, Black 05-285B

Key Details
Brand Geissele Automatics
Manufacturer Part Number 05-285B
UPC 854014005793
SKU GEI05-285B
Current Stock 8 available
Quantity Updated Apr 24, 2026 11:20 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

The Super Modular Rail (SMR) MK8 M-LOK is Geissele's ultra-modular handguard model. The SMR MK8 is one of the first rails available to utilize the Magpul M-LOK technology. These rails are designed to give the user full modularity while maintaining a strong and rigid platform. Maximum venting at the lower 45-degree quadrants create maximum heat dissipation and also dramatically reduces the rail's overall weight. The MK8 utilizes Magpul's M-LOK technology at the 3, 6, and 9 o'clock positions, as well as the upper 45-degree quadrants. The SMR MK8 is both versatile and modular, allowing the user to tailor their platform to his or her unique needs. The SMR MK8 also features Geissele's proprietary 2.25" long barrel nut. This increases the surface contact where the rail interfaces with the receiver and creates a platform that can be trusted to be straight and true the entire length of the free float rail. This increases accuracy and zero repeatability during disassembly and reassembly when performing maintenance. Requires a Geissele barrel nut wrench for installation (sold separately).

Features
  • Height: 2.3 "
  • Inner Diameter: 1.35 "
  • Outer Diameter: 2.11 "
  • Weight w/ Hardware: 13.1oz.
  • Length 13.5";Includes Barrel Nut (Barrel Nut Wrench Sold Separately)"
  • Geissele Automatics AR-15 13.5 Super Modular Rail MK8 M-LOK"
Specifications
UPC: 854014005793
Manufacturer: Geissele Automatics
Manufacturer Part #: 05-285B
Model: Super Modular
Model (Alt): MK8
Size: 13.5"
Type: Handguard