My dream weapon is an incredibly versatile shotgun. It would be a 7 gauge smootbore with automatic and pump-action fire modes. It would have an integral tube magazine below the barrel, but also accept box magazines below the action. Two lasers, one for close combat, and one for range finding. The stock would telescope, and have a recoil pad. The real versatility would come from different specialized ammunition: Buckshot: space age buckshot to ensure maximum destruction to "soft" targets at close range. Slug: a more precise shot for breaching and mid range direct fire Incendiary: Some things need to burn. Frag-7: Ammunition that can be programmed to airburst at ranges detected by the laser, this would allow me to attack over hills, cover, and around corners Gyrojet rockets: for long-range encounters, gyrojet self-stabilizing ammuntion allows me to engage distant foes by turning my shotgun into a small rocket launcher. Using the gyrojets would be aided by the addition of a small scope, and keeping track of ammuntion loaded would be aided by a holographic interface displaying ammuntion in each magazine. Thanks to the OP for asking me to dream.