The UTG® Remington 870 scope mount with sidesaddle and Picatinny rail is perfect for your 12 gauge Remington 870 express, 870 DM Mag-Fed Shotgun. This saddle mount fits Remington 870 shotguns with 3.5" and Under Chamber. The UTG® 870 Optic Mount is made form 6061-T6 matte black hard anodized aluminum construction and the removable 4-capacity shot shell carrier side saddle is included. No permanent modification is required to install this mount. UTG Lifetime warranty.