Mount your AR-15 mag holder on the outside of your gun safe with the AR-15 Mag Holder Attachment Kit. Designed to mount one AR-15 Mag Holder to the outside of your gun safe. Installation Instructions: Remove the adhesive film coating of one side of the square and position it as close to the corner of the mag holder as possible without covering any hole. Apply one square to each corner and apply firm pressure to each square for 30 seconds. Wipe the area n the safe where you will attach the mag holder with a dry cloth. Remove the adhesive film coating of all four corners and press the mah holder firmly into place on the gun safe. Apply firm pressure to each corner for 30 seconds. Wait 72 hours before loading with magazines.