Exclusively from Monstrum - the Grimlock Series optic mounts offer a sleeker and more distinctive design than our previous generation mounts, contoured to the curvature of your receiver. All with the same functionality and reliability as our standard optic mounts. Dedicated red dot mount built specifically for Winchester SXP / Defender / 1300 shotgun platforms. Not compatible with other shotgun models. Available in RMR, Venom/Docter, or RMSc footprint standards. Please view compatibility chart to verify the compatibility of your red dot before purchasing. Includes: Winchester SXP/Defender/1300 Red Dot Mount, Screws Materials: 6061 Aircraft Grade Aluminum Compatibility: Winchester SXP/Defender / 1300 Weight: 1.1 oz Length: 4 in Width: 1.2 in Color: Black Warranty: Lifetime