This Mil-Spec Model AR15/M4 fixed carbine stock gives you a non-collapsing stock option for mil-spec size carbine-length buffer tubes. This Fixed M4 Thumb hole stock has a internal storage compartment in pistol grip and rubber butt pad for comfort. Constructed of polymer and hard anodized aluminum. Stock features multiple QD sling cup points to install a QD sling (cups not included). Color is black and mounting bolts and tool included.