25 M.O.A. Taper. PRI Bar Night Vision Rail for Remington 700 Short Action. This Short action aluminum base with full 1913 rail has two different elevations. It is designed to place night vision in front of the scope. This base is 16 inches in length and is ambidextrous. It comes with an requires #8-40 screws for mounting. Mounting will require altering of the receiver if not already drilled for 8-40 screws (standard is 6-48). Rail has additional mounting holes on each side for additional rails can be added for flashlights or other optics.