Williams Gun Sight Williams Ace In The Hole For T/c Encore And Prohunter No Front Sight Black. In case something happens to your primary sighting option you have an Ace in the Hole with a backup aperture sight. Specifications for Williams Gun Sight Ace In The Hole Picatinny Scope Rail For T/C Encore And Prohunter: Manufacturer: Williams Gun Sight Color: Black Fabric/Material: Metal Gun Model: Thompson/Center Pro Hunter Thompson/Center Encore Gun Type: Muzzleloader Additional Features: No Front Sight Features of Williams Gun Sight Ace In The Hole Picatinny Scope Rail For T/C Encore And Prohunter: Picatinny scope rail Rear 3/8 x .093 aperture has windage and elevation adjustment Interchangeable apertures and ghost ring available CNC machined out of high grade aluminum Package Contents: Williams Gun Sight Ace In The Hole Picatinny Scope Rail For T/C Encore And Prohunter Williams Gun Sight 71009: Williams Ace In The Hole For T/c Encore And Prohunter No Front Sight Black