The Cobra Stock MK2 features our own Patented locking system, battery storage compartments and an oversized cheek rest. The Cobra MK2 is easy to install and remove on the 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. 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.