FEATURES-ForRemington 87012 gauge-Provides three different ways to mount your sling or accessories:-Picatinny rail -Push-button base -Standard locking swivel stud-The steel magazine tube mount gives extra security to the 12 gauge extended magazine tube-Rail & push button base are reversible & can be mounted to either sidePRODUCT SPECIFICATIONS:Dimension 1.20 X 2.85 X 5.35Height 1.2000Width 2.8500Length 5.3500TYPE/COLOR EXTENDED MAG TUBE MOUNT/BLACKSIZE/FINISH REMINGTON 870MATERIAL BLACK OXIDE STEEL 3 DIF WAYS TO MOUNT SLINGS OR ACCESS; PICATINNY RAIL, PUSH BUTTON BASE & LOCKING SWIVEL STUD....REVERSIBELNO DIRECT SHIP TO CALIFORNIA