Precision-made sights for rifles, both with and without ramp bases. The blade is gracefully contoured, sloping toward the front. Made of steel and nicely blued to look good on any gun. RAMP MOUNTED FRONT SIGHT: ”MR” features a straight-sided base for guns having a ramp base on the barrel. All “MR” sights have a .340" (8.6mm) wide base. Ramped front sights are available with three beads, Pope’s Island Gold, flat faced gold available in 1/16" (1.6mm) diameter. Ivory, flat faced white polymer in 1/16" (1.6mm) diameter. RAMP MOUNTED - .340 wide base.
Big Book Catalog, Issue:73, Page:314
SPECS: Steel, blue, polished finish. .620" (15mm) long. ORDERING: Select the sight height required using the Marbles and/or Williams charts and determine which Sight Style, Bead Type and Width is needed from the info above. Using the chart beside this copy, find the correct Marbles Sight and note the 9 digit Ordering No. For example: If you need a Contoured Ramp Front Sight, “MR” width, .290" (7.4mm) high, with a 1/16" (1.6mm) gold bead, follow the Height listing to the .290" figure, read across on the “MR” line to the 1/16" gold bead and note the number: 579-502-911. 1" = (2.54cm)