Interchangeable sight insert cards are manufactured from G1095 spring steel, photo-chemically etched within a .002″ total tolerance for a precise fit. Each insert is .012″ thick, allowing the shooter to super-impose two inserts over each other, giving a custom sight picture. Weighs 1.3 oz.
First Photo: Sharps Style Card A
Second Photo: Sharps Style Card B
Third Photo: Stevens/Winchester Sight Insert Cards