Geissele 9.5″ Super Modular Rail MK4 M-LOK

The Geissele Super Modular Rail MK4 M-LOK is a lightweight rail. It is purpose built and features a M1913 picatinny rail sections at the 3, 6, and 9 o’clock positions. The rail features maximum venting for heat dissipation can dramatically reduces the rails over weight while maintaining its same strong and rigid platform. It uses Magpul’s M-LOK technology at the 3, 6, and 9 o’clock positions as well as the upper 45 quadrants. It is versatile and modular, that allows the user to tailor their platform to their unique needs.

The Super Modular Rail features 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. This increases accuracy and zero repeatability during disassembly and reassembly when performing maintenance.


Height 2.4″
Color Black or DDC
Material 6061-T6
Finish Type 3 Hardcoat Anodize
Available Lengths 9.5″, 13″, 15″
Inner Diameter 1.35″
Outer Diameter 2.11″
SMR MK4 9.5″ Weight 9.3 oz (11.2 oz w/ barrel nut)
SMR MK4 13″ Weight 11.8 oz (13.5 oz w/ barrel nut)
SMR MK4 15″ Weight 12.8 oz (15.1 oz w/ barrel nut)


More from Geissele

Additional information

Weight N/A
Color Options

Black, Desert Dirt


There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.