Specifications
Description
Geissele’s Super Modular MK4 Rail is used by the Federal Bureau of Investigation due to its strength, modularity, and M-LOK compatibility. It features M1913 picatinny rails in the 6 o’clock and 12 o'clock positions, as well as shorter M1913 picatinny rails in the front 3 o’clock and 9 o'clock positions. This accommodates a massive amount of accessories such as optics, iron sights, fore-grips, and tactical lights/lasers. The Bottom picatinny rail is also elongated to mount accessories more comfortably. In addition to the picatinny rails, the Super Modular MK4 Rail features M-LOK slots in the 3, 6, and 9 o’clock positions as well as in the upper 45° quadrants. Not only do the M-LOK rails provide more mounting locations, they also help reduce weight and provide more ventilation to help cool off the barrel during extended firing sessions.