The Armortech HD was voted best buy winner, from inside archery magazine, its very first year on the market! The Armortech HD packs a punch with ists superior patent pending technology, innovative design, and deadly accuracy. Features fibers that are protected their entire length by Axcel's Armor Fiber Technology and an innovative scope design True Center Vision. All Armortech HD sights include a Matthews Harmonic Damper, and are available with 4, 5, or 7 pins in .010, .019 and .029 fiber size.