The Geissele Automatics MK4 Super Modular Rail is a 10.5″ M-LOK handguard engineered for precision and versatility. This lightweight yet rigid rail is purpose-built and features integrated M1913 picatinny rail sections at the fore of the rail in the 3, 6 and 9 o’clock positions, with maximum venting for heat dissipation that dramatically reduces the rail’s overall weight while maintaining a strong and rigid platform. Utilizing Magpul’s M-LOK technology at the 3, 6, and 9 o’clock positions, as well as the upper 45 quadrants, the SMR MK4 is both versatile and modular, allowing the user to tailor their platform to unique needs.
The SMR MK4 features Geissele’s proprietary 2.25″ long barrel nut, which 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. The lower 45° quadrants feature ample venting to help cool a hot barrel after extended shooting sessions and also cut down on unnecessary weight. Geissele Automatics warrants its firearms, components, and tools against defects in materials and workmanship during the lifetime of the product with a Lifetime Warranty.
