The Nikon Slug Gun Scope 3-9x40 offers hunters a means to take advantage of their shotgun's shooting characteristics. Designed around Nikon's patented BDC (Bullet Drop Compensating) reticle system this slug scope offers accuracy potential never before thought possible from a slug gun. Nikon Slug Gun Scope 3-9x40 features engineered specifically for rifled slug guns BDC Reticle which is the trajectory compensating reticle that provides fast, simple aiming points for various shot distances. Calibrated to be sighted in on the crosshair at 50 yards, the BDC 200 has two ballistic circles that represent 100-yard and 150-yard aiming points. For exceptionally accurate gun and load combinations, the lower reticle post becomes a 200-yard aiming point as well. Well-known hunting writer and slug gun expert Dave Henderson worked with Nikon to develop this scope. His experience and knowledge proved invaluable in creating the ultimate slug gun scope. "I’ve always been a fan of Nikon optics and working with them to develop a scope specifically for slug hunters was a real joy," said Henderson. "Slug hunters have long been in need of a scope built for their guns and the new Nikon SlugHunter won't disappoint." A full five inches of eye relief means a safe and comfortable shot with even the hardest hitting magnum loads. Nikon multicoated optics produce crisp, clear images, while 92% light transmission keeps the hunter in the field when the game is moving. The innovative Nikon Slug Gun Scope 3-9x40 features 1/4-MOA click adjustments, 100-yard parallax setting and Nikon's rugged waterproof, fogproof and shock proof performance.