The Super Modular Rail (SMR) MK4 M-LOK™ is one of Geissele's original models, and one of the most classic. The SMR MK8 is one of the first rails available to utilize the Magpul M-LOK technology. These rails are designed to give the user full modularity while maintaining a strong and rigid platform.
These rails are purpose-built and 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 also dramatically reduces the rail's overall weight, while maintaining its same strong and rigid platform. Utilizing Magpul 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 his or her unique needs.
The SMR MK4 also features Geissele's proprietary 2.25" long barrel nut. This 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. This increases accuracy and zero repeatability during disassembly and reassembly when performing maintenance.
Note: This is the 13.5" rail. Geissele used to sell this as a 13.0" rail, with the same model number. As of this update, we have one 13" in DDC. Just ask in the comment if you want the older 13" version.
Note: package contains rail, barrel nut and allen wrenches. Does not contain gas block. Does not contain barrel nut wrench
Manufacturer's Product No. 05-278
