Geissele Automatics MK8 Super Modular Rail M-LOK – 9.3″


DDC (Desert Dirt Color)

Product Description

The Super Modular Rail (SMR) MK8 M-LOK™ is Geissele’s ultra-modular 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° quadrants creates maximum heat dissipation and also dramatically reduces the rail’s overall weight. Utilizing Magpul’s M-LOK technology at the 3, 6, and 9 o’clock positions, as well as the upper 45° 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.

  • HEIGHT: 2.3″
  • COLOR: Black or DDC
  • MATERIAL: 6061-T6
  • FINISH: Type-3 Hardcoat Anodize
  • LENGTH: 9.3″
  • OUTER DIAMETER (DAQ*): 2.11″
  • SMR MK8 9.5″ WEIGHT: 8.4oz (10.3 oz w/ barrel nut)




Technical Information

Finish Anodized
Mounting Platform
Material Aluminum

Catalog Location

California Prop 65 Warning

WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information visit

Customer Reviews

Based on 2 reviews
Geissele MK8

The MK8 rail from geissele I got was 9.3 inches in length. I got the desert dirt color and knowi that the ddc has multiple shades of the color I was happy I got one in a coyote or taupe color. Was delivered quick by MILSPEC retail.

Joel F.
Fast shipping great price

Got this as a gift didnt expect it here in 2 days after black Friday. Best price on the net always a pleasure to deal with Mil Spec Retail