The Leupold Mark 5 M5C3 was built with the serious shooter in mind. With input from elite level military personal and professional shooters, Leupold pushed the engineering limits. It features the Twilight Max HD Light Management System for excellent edge to edge clarity, low light performance and increased contrast. The M5C3 Zerolock adjustment turret is a 3 turn dial with 10 Mils of adjustment per turn with tactile revolution indicators. This scope provides the elite optical performance and rugged reliability that you've been searching for.Specifications and Features: Adjustment Click Value: 1/10 MIL Adjustment Type: Click Country of Origin: United States of America Exposed Turrets: Yes Eye Relief: 3.8-3.6 Inches Eyepiece Bell to Objective Bell Length (B): 6.21 Inches Eyepiece Bell to Turret Length (D): 1.98 Inches Eyepiece Diameter (H): 1.76 Inches Eyepiece Length (E): 3.27 Inches Fast Focus Eye Piece: Yes Turret Height: Medium Turrets Resettable to Zero: Yes Warranty: Leupold Gold Ring Full Lifetime Waterproof: Yes Zero Stop: Yes