Redfield Bases Redfield 4-Screw Standard Rear, Extension Front, 30mm, High. Matte Finish. 47927. PreviousRedfield Dualite Bases. c.1930's-50's Redfield 4-Screw Standard Rear, Extension Front, 30mm, High. Matte Finish. 47927. Redfield 4-Screw Standard Rear, Extension Front, 30mm, High. Matte Finish. 47927. $79.00 Modern 4-screw design. Add To Cart Facebook0 Twitter