Ultimate Arms Gear AR15 AR-15 M4 M16 .223 5.56 Quick Access Concealed Safe Metal Mag Magazine Magnet Mount Holder 2.75" x 10" Magnet. Can Be Installed on Drywall, Wood Surfaces, Interior & Exterior of Gun Safe. Designed to hold Metal Magazine. Will Not hold plastic or plastic coated magazines. Self-Adhesive Side with Hardware Included. Will hold Empty Magazines, Will hold Small Caliber Magazine loaded up to 2 lbs.