Lockdown AR Magazine Rack, Black 222972 The Lockdown Magazine Rack is ideal for keeping AR-15 magazines organized. It conveniently holds magazines either loaded or unloaded. It is designed to stand upright on a shelf or any flat surface or it can easily be mounted to a wall or vault door. It is compatible with both mil-spec and polymer mags. Holds any in line magazine from 10 round up to 30 round. The vinyl coated steel structure is durable and won't scratch or mar surface finishes.