Super Modular Rail MK4 | 10.5"

Geissele Super Modular Rail MK4 | 10.5" - M-LOK

The Super Modular Rail (SMR) MK4 M-LOK™ is Geissele’s ultra-rugged M-LOK option. These rails are custom-engineered and feature integrated M1913 Picatinny rail sections at the front of the rail in the 3, 6, and 9 o’clock positions. Maximum ventilation for heat dissipation drastically reduces the rail’s overall weight while maintaining the same strong and rigid platform. Magpul’s M-LOK technology is used at the 3, 6, and 9 o’clock positions as well as in the upper 45 quadrants. The SMR MK4 is both versatile and modular, allowing users to customize their platform to their individual needs.

The SMR MK4 also features the 2.25-inch-long barrel nut developed by Geissele. This increases the contact surface at the interface between the rail and the receiver, creating a platform that is straight and precise along the entire length of the free-floating rail. This enhances accuracy and zero-point repeatability during disassembly and reassembly for maintenance.