The innovative and feature-packed CBS Collapsible Buttstock fits the AR-15 and M16, offering increased comfort, better control, and useful storage and mounting options. Ambidextrous side compartment with snap tight latch provides waterproof storage for 4 CR123 batteries. Side Picatinny rail allows addition of adjustable cheek piece or mag holder. Non-slip rubber buttpad with tapered angle allows for faster shouldering, increased comfort with body armor, and more secure positive shoulder purchase. Two ultrasonically welded metal quick-release sling mount points in addition to standard sling mounts. Ergonomic stock latch. No gunsmithing required to install or remove. Lifetime warranty.