A group of U.S. military operators asked Leupold to develop a scope to aid them in their responsibility of providing overwatch support as snipers. In that capacity, they often take to the high ground, which frequently requires kicking in the door of a building and clearing it, room-to-room, so they can set up on the roof.
Leupold CQBSS Gallery
Keep your defensive firearm is secure and away from prying hands.
Mount a red dot to your shotgun and keep your spare shotgun ammo close at hand.