Vortex Stonerun™ 4-12x44 Dead-Hold® BDC MOADial up the magnification you need for deadly accuracy on distant game. Combining an impressive sight picture, tough construction, and a second focal plane, Dead Hold BDC reticle, the Stonerun 4 12x44 riflescope is a punched tag waiting to happen. Fully Multi Coated Lenses Anti reflective coatings on all air to glass surfaces provide increased light transmission for greater clarity and low light performance. Nitrogen Gas Purged Gas purged and O ring