BSA Special Series 3-9x40mm Rifle Scope (Rimfire) with 30/30 Duplex Reticle and 100-Yard Parallax: * Features: * Includes 3/8" rail rings * Coin-adjustable turret * Fogproof, shockproof, waterproof * Eye relief: 3.5" * Magnification: 3-9x * Object lens diameter: 40mm * Field of vision at 100 yds: 42-14 * Parallax setting: 100 yds * Click adjustment value: 1/4 * Adjustment range: 40-40 * Weight: 12 oz * Dimensions: 13.8"L x 15.2"W x 9.2"H * Model# S39X40WRCP