The Vortex Optics Shotgun Enclosed Micro Red Dot Sight is a shotgun-ready red dot for quick target acquisition. A large viewing window and unlimited eye relief make it easier to find the dot when you're moving fast, and the 3 MOA dot works well on stationary or slow-moving targets. The enclosed aluminum housing is waterproof, fogproof, and shockproof, and the integrated universal mount fits compatible drilled and tapped shotgun receivers. Motion activation, auto shutoff, and a side-loading battery help save battery power and make maintenance easy.