Dedicated optic mounting platform built specifically for Henry Big Boy lever action rifles, allowing for precision mounting of your preferred optic. Compatible with Henry Big Boy H6 (H006) and H12 (H012). Not Compatible with Henry H1 Frontier (H001), Henry H9 (H009), Henry Big Boy X model 45-70 (H010), Henry Golden Boy, or other Henry rifle models. Scope mount installs directly to receiver via the factory mounting holes and included set screws with no additional hardware required. Allows for the mounting of Picatinny or Weaver standard scope rings, scope mounts, red dots, or other optics. All Monstrum optics mounting products come with a lifetime guarantee.