TACFUN Tactical Compact 2.5-10x40 Scope Red Green Mil-dot Dual illuminated 2.5-10X40mm Dual-Illuminated Scope offers a compact design with a 40mm objective for superior light transmission. An angle cut shade reduces excess glare in sunny conditions. Magnification is 2.5X-10X with bdc Tube diameter is 1" Objective is 40 mm Length is 8.25" Weight is 16.8 oz.