Alpha Stock Kit (Sand) The Alpha Stock is versatile enough to work with any AR build. It features a low profile adjustment latch, double injected rubber check rest, and slick sided profile. The butted profile is angled to accommodate plate carriers and the aggressive texturing will ensure minimal movement when manipulating the rifle under stress. The stock kit comes with everything you need to get your rifle up and running including a steel endplate, castle nut, buffer, buffer spring, and a Mil-Spec anodized aluminum buffer tube. The lightweight construction will ensure that your rifle stays agile and the stock's ergonomics will augment comfort and efficiency while shooting. 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. Features: Length (in): 7.6 Receiver Extension Type: Mil-Spec 6061-T6 Aluminum Weight (oz): 18.1 Length of Pull Range (in): 3.3 Length of Pull Collapsed (in): 12.4 Length of Pull Extended (in): 15.7 Material: Aircraft Grade Aluminum, High Strength Steel, High-Density Polymer/Rubber Color: Sand