Weaver Grand Slam Standard Rings, Extended Front and Standard Rear, 30mm High Gloss (49228) Type_Assorted Spare Parts The size in the description

The size in the description refers to lens size

Springfield 03 (Front)

410 bore shotguns

Fits most percussion rifle and single shot pistol nipples

With one of the finest internal finishes in the industry

Weaver Grand Slam Standard Rings, Extended Front and Standard Rear, 30mm High Gloss (49228) Type_Assorted Spare Parts The size in the descriptionGrand Slam rings are constructed of solid steel which yields amazing strength and scope retention. Scope returns to zero upon reinstallation. CHOOSING RINGS: Ring height is determined by measuring the outside objective (bell) diameter on your scope. If you aren't sure which rings will suit your needs, please refer to the Ring Height Application Chart. Technical Information Material: Steel Style: Standard Ring Height: . 401" (measured from base of ring