PRI Bar Night Vision Rail for Remington 700 Long Action. This Long 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 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.