Buy it @ Optics Planet (Click Here)

"This is a good stock option for our Heatseeker chassis for the Ruger American.  Fits over a standard carbine buffer tube and gives a nice cheek height that is adjustable." - JSharps

From FAB Defense:

FAB Defense crafted these AR15 Stocks from durable and lightweight fiberglass reinforced polymer composite so that it's rugged enough to withstand rough conditions in the field without weighing you down enough to decrease your mobility. With no protruding parts, this FAB Defense AR15/M4 Buttstock w/ Cheek Rest won't get snagged on your gear during critical moments when you need your weapon most. Quickly shoulder your rifle and use the integrated cheek rest to comfortably stabilize your aim. There's also two QD rear sling swivel connections so that you can carry your weapon with ease.