With a redesigned HD optical system that cuts inches and ounces off the original platform, the new Spitfire HD Gen II 3x and 5x models are a shooter's dream come true. Choose your ideal magnification and mounting height, then rely on the BDC-style reticle to subtend with most popular 5.56 cartridges for quick holdovers at known distances, keeping you locked on target. Product Specifications Mount: Type Multi-Height Magnification: 3x Objective Lens Diameter: 21 mm Eye Relief: 2.6 inches Field of View: 37.9 feet/100 yds Adjustment Graduation: 1 MOA Max Elevation Adjustment: 250 MOA Max Windage Adjustment: 250 MOA Parallax Setting: 100 yds Length: 3 inches Weight: 9 oz