Adventuring While Asleep

[Happened while I was camping in November]
This one was very vivid and lasted much longer than 3 seconds. I was in a building, I concluded it to be a tower. I started in a elevator, came up, and was in a corridor. Saw a few guards, and a rather attractive female who appeared to be a under cover agent. I took a right and was in a are with a stargate looking thing. (If you've seen Stargate Atlantis, you'll know what that is.) More guards and someone that was helping me. I did my reality check, confirmed it and tried to summon up a gun. Didn't materialize in my hands, nor on my back. So he handed me a musket and a nice lookin' sword. A couple more guards came through the gate. I've got a feeling there's a powerful outside threat, didn't get a chance to explore the corridor leading to a populated are because I went into a normal dream. Felt to be about a 5-10 minute lucid though!