Out of stock
Geissele 13.5" MK4 M-Lok Super Modular Rail, Black ‒ 05-278B
Out of stock

Geissele 13.5" MK4 M-Lok Super Modular Rail, Black ‒ 05-278B

SKU 60733
Model Number 05-278B
Brand Geissele
UPC 854014005717
Caliber .223 Remington, .224 Valkyrie, .300 AAC Blackout, .308 Win, 5.56x45mm, 6.8 SPC II
This product is fulfilled by a PSA Partner and shipping times may vary.
Customers must read Compliance Information before purchasing.

Product Details


Brand: Geissele
Model: Super Modular Rail MK4
Length: 13.5"
Material: 7000 Series Aluminum
Finish: Type 3 Hardcoat Anodize
Inner Diameter: 1.35"
Outer Diameter: 2.11"
Weight: 11.0 oz.
Installed Weight (w/ Hardware): 12.8 oz.
Weapon Platform: AR15/M4/M16

*Does not include gas block and barrel nut wrench.


The Super Modular Rail (SMR) MK4 M-LOK™ is Geissele’s ultra-rugged 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.


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These items are controlled by the U.S. Government and authorized for export only to the country of ultimate destination for use by the ultimate consignee or end-user(s) herein identified. They may not be resold, transferred, or otherwise disposed of, to any other country or to any person other than the authorized ultimate consignee or end-user(s), either in their original form or after being incorporated into other items, without first obtaining approval from the U.S. government or as otherwise authorized by U.S. law and regulations.