You can find the Geissele Super Modular Rail M-LOK MK14 13.5" Desert Dirt here Fast FREE shipping on this item!

The Geissele Super Modular Rail (SMR) MK14 handguard is a lightweight free floating rail system designed to be smaller in diameter and overall height than other rails for a slimmer package. The M-LOK mounting system slots allow accessories to be mounted at the 3, 6, and 9 o'clock positions. The top of the handguard has a standard Picatinny rail interface the entire length of the handguard. The SMR features an updated version of Geissele's 2.25" long barrel nut to provide a stable and rigid platform for the rail. Barrel nut wrench sold separately.
 
Color: Desert Dirt
Length: 13.5"
Height: 2.02"
Inside Diameter: 1.27"
Outside Diameter: 1.52"
Installed Weight (w/ Hardware): 12 oz.