The Geissele Automatics SMR or Super Modular Rail is an Ultra Rugged Picatinny/M-LOK Solution

The Geissele Automatics Super Modular Rail (SMR) MK8 is an incredible durable AR-15 free float hand guard with some unique features. You will notice a full length m1913 picatinny rail runs the entirety of the top of the hand guard. Further increasing the modularity of this rail is the use of M-LOK slots in the 3, 6, and 9 O' Clock positions as well as located on the upper 45 quadrants. The rail is made from 6061-T6 aluminum with a hard coat anodized finish. The proprietary barrel nut can only be installed with a Geissele barrel nut wrench which is sold separately.

Geissele Automatics AR-15 Super Modular Rails MK8 M-LOK (Desert Dirt Color) Specifications and Features:

• Geissele Automatics 05-1657S
• Super Modular Rails MK4 M-LOK
• 10.5" Free Float Hand Guard
• Full Length Top Picatinny 1913 Rail
• M-LOK Sections at 3,6 and 9 O' Clock and Upper 45 Quadrants
• Proprietary Barrel Nut (Requires Separate Purchase of Barrel Nut Wrench 02-243F)
• Height 2.4"
• Inner Diameter 1.35"
• Outer Diameter 2.11"
• Overall Weight 9.9oz (12 with Barrel Nut)
• 6061-T6 Aluminum
• Type 3 Hard Coat Anodized
• Desert Dirt Color

Does NOT Include:

• Barrel Nut Wrench

Fits:

• Mil-Spec AR-15/M4 Upper Receivers

Note:
Compatibility with billet receiver sets is unknown.