Enhance your shooting experience with the NcSTAR MSHRCVMOS Mossberg 500/590 Shotgun Receiver Picatinny Rail Mount, designed for optimal optic attachment. This lightweight and durable rail mount allows for easy installation while preserving the functionality of your shotgun's front bead sight through its innovative see-through channel. Mossberg(R) 500/590 Receiver Picatinny Rail Mount for mounting optics Low Profile design with See-Through Channel for bead sight use Screws included for straightforward installation All Aluminum Construction with Black Anodized finish Length: 5.4 inches Weight: 1.3 ounces Fits Mossberg(R) 500/590 models with factory pre-drilled holes Upgrade your Mossberg shotgun's versatility with this essential accessory.