The GunVault MagVault, is a revolutionary way to keep your AR rifle safe and secure at home, during travel or on the range. This unique design fits virtually all .223/5.56 AR carbine rifles and locks in place quickly. It's versatile, easy to use and works better than a trigger lock. The MagVault is a must for AR owners. Once the AR MagVault is locked into place a round cannot be inserted or chambered..