An automatic rifle storage assembly for storing an automatic rifle includes a first member that is mountable to a vertical support surface. A cup is coupled to and extends away from the first member to receive a muzzle of an automatic rifle. A second member is slidably inserted into the first member and the second member is mountable to the vertical support surface. A clamping unit is coupled to the second member to releasably engage a buffer tube of the automatic rifle for storing the automatic rifle in a vertical orientation.