Super Modular Rail MK4 M-LOK
The Super Modular Rail (SMR) MK4 M-LOK™ is Geissele’s ultra-lightweight M-LOK option. 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'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 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.
Bundled with a low-profile Geissele Super Gas Block, a $59 value, the SMR MK4 is not only feature packed, but it is also value packed.
Best rails I've owned - Joelski
I have Mk 4's on two rifles and can't say enough good about them. The 1913 at the end allows ideal placement of my bipod and the M-Lok at 10:30 and 1:30 allow tight-in mounting of your weapon mounted lights. These rails have what I need, where I need it, and nothing I don't need everywhere else. Looking forward to adding a Mk 13 to my next rifle, Thanks for the dependable gear!November 16th, 2017
MK4 outstanding - Brian
I recently purchased the MK4 9" rail, the quality is outstanding, and the customer service is even better. I'll be buying more. ThanksJune 20th, 2017