Features: Proudly Designed and Made in USA The Michigan Difference - Enhanced Precision Material Strength and Quality Control Replacing UTG's Classic MNT-MB500T Precision Machined from Aircraft Grade Aluminum with Matte Black Hard Coat Anodize 5.5 in. Overall Length with13 Picatinny Rail Slots for Dot Sights Rear Sights and Flexible Positioning of Magnified Optics for Proper Eye Relief Adjustment Low Profile See Thru Design Allows Use of Front Sight Bead Contoured Bottom Perfectly Fits Mossberg Model 500 with Drilled and Tapped Receiver Includes Assembly Screws and Tools for Simple and Friendly Installation No Gunsmith RequiredSpecifications: Material: Aluminum Weight: 1.2 oz Pieces: 1 No. of Rails: 1 Length: 5.5 inch Width: 0.36 inch Height: 0.83 inch