Elcan XOPTEK4 Rail Mount Kit 3MOA. The TT735P includes Tangent Thetas legendary elevation and windage turrets that deliver precise tactile response and feature a truly TOOL-LESS RE-ZERO procedure and lockable diopters. Tangent Theta rifle telescopes are built in Canada and are specifically designed and function-tested for long lifecycles in the harshest of environmental conditions. Specifications for Elcan XOPTEK4 Rail Mount Kit: Manufacturer: Elcan Color: Black Package Contents: Elcan XOPTEK4 Rail Mount Kit Elcan RD020B-RM: XOPTEK4 Rail Mount Kit 3MOA