Excalibur Crossbow 1in. Weaver Scope Rings for 7/8in. Dovetail 46836. They are strong enough to withstand the heaviest recoil without moving or changing point of impact. Specifications for Excalibur Crossbow 1in. Weaver Scope Rings for 7/8in. Dovetail: Manufacturer: Excalibur Crossbow Color: Black Fabric/Material: Aluminum Quantity: 1 Pair Package Contents: Excalibur Crossbow 1in. Weaver Scope Rings for 7/8in. Dovetail Made from tough lightweight aluminum and are anodized to a flat non-reflective finish. They are strong enough to withstand the heaviest recoil without moving or changing point of impact.