Nikon has the M-Tactical Riflescope uses a mix of optical design, superior glass and innovative material coupled with 100 years of Nikon know how with optics. This scope features proprietary glass and multi-coating technology to give you bright, high contrasting sight pictures. Combine those with purpose driven reticules for long range shooting and you have a scope that will reach out there time and again and still be on target. With knurling on the turrets and zoom rings that are ergonomically designed for comfortable function with virtually any finger size. Specifications and Features: Nikon M-TACTICAL 1-4X24 Riflescope 16521 MK1-MOA MT Reticle Magnification 1-4x Objective Diameter 24mm Tube Diameter 30mm Fixed Parallax Weight 16.4 oz Overall Length 10.4" 4 Time Zoom Ratio Waterproof, Fogproof, Shockproof Spring Loaded Instant Zero Reset Turrets Matte Black