Geissele Super Modular Rail MK4 M-LOK

Ultra-Rugged Design

The Super Modular Rail (SMR) MK4 M-LOK™ is Geissele’s ultra-rugged M-LOK option. These purpose-built rails feature integrated M1913 picatinny rail sections at the fore of the rail in the 3, 6, and 9 o’clock positions. Maximum venting for heat dissipation significantly reduces weight while maintaining a strong and rigid platform.

Versatility and Modularity

The SMR MK4 utilizes Magpul’s M-LOK technology at the 3, 6, and 9 o’clock positions, as well as the upper 45 quadrants. This modularity allows users to tailor their platform to their unique needs.

Enhanced Barrel Nut Design

• Barrel Nut Length: Features Geissele’s proprietary 2.25" long barrel nut.
• Improved Contact: Increases surface contact with the receiver, ensuring a straight and true platform.
• Accuracy and Zero Repeatability: Maintains precision during disassembly and reassembly for maintenance.