The Geissele MK8 Super Modular Rail (brand part no. 05-285B) is a 13.5-inch, black M-LOK handguard built as Geissele’s ultra-modular option for the AR platform. Geissele cuts M-LOK slots at the 3, 6, and 9 o’clock positions as well as the upper 45-degree quadrants, giving builders full freedom to mount lights, grips, and other accessories anywhere they’re needed. Maximum venting at the lower 45-degree quadrants dramatically reduces the rail’s overall weight while dissipating heat, and the free-float design is built for Mil-Spec M4 upper receivers so builders can tailor the platform to their needs.

Key Specifications

• Measures 13.5 inches in length.
• Features M-LOK slots at the 3, 6, and 9 o’clock positions.
• Adds further M-LOK at the upper 45-degree quadrants.
• Maximum venting at the lower 45-degree quadrants reduces weight and aids heat dissipation.
• Built as a free-float design.
• Designed for Mil-Spec M4 upper receivers.
• Finished in black.

Frequently Asked Questions

What color/finish does this rail come in? Black.

Is this rail free-float? Yes, it is a free-float design built for Mil-Spec M4 upper receivers.

Buy the Geissele MK8 Super Modular Rail

Get full modularity and reduced weight with Geissele’s MK8 rail. Order it from our Geissele Automatics lineup of AR handguards for fast shipping from our Lubbock, Texas gun shop.