The Cobra Stock MK2 features our own Patented locking system, battery storage compartments, and oversized cheek rest. The Cobra MK2 is easy to install and remove on any Mil-Spec buffer tube. The butt-pad profile is angled to accommodate plate carriers, and the aggressive texturing will ensure minimal movement when manipulating the rifle under stress. With multiple sling points and lightweight snag-free construction, the Cobra fits into most builds with ease. For your safety, Trinity Force recommends this part be installed by a competent, qualified gunsmith/installer with an understanding of the weapon platform that the part is being installed on. Always make sure the firearm is unloaded and pointed in a safe direction when working.