NcStar Mossberg Shotgun Receiver Rail Features The NcStar Mossberg Shotgun Receiver Rail is engineered to fit Mossberg 500 and 590 models with factory pre-drilled receiver holes. A low-profile Picatinny rail with a see-through channel allows continued use of the front bead sight while an optic is mounted. This makes it a practical shotgun Picatinny rail for maintaining traditional sighting alongside modern optics. All-aluminum construction keeps weight to a minimum while maintaining dependable strength under recoil. The black anodized finish provides corrosion resistance and a clean appearance. Included mounting screws allow for straightforward installation and long-term reliability. NcStar Mossberg Shotgun Receiver Rail Specifications Manufacturer: NcStar Model: Mossberg Shotgun Receiver Rail Category: Scope Base Firearm Type: Shotgun Firearm Fit: Mossberg 500 Mossberg 590 Mount Type: Picatinny/Weaver Material: Aluminum Finish: Black Anodized Length: 5.4 Weight: 1.3 oz Includes: Mounting Screws Warranty: Limited Lifetime