It would depend on what type of gun you are searching for. Are you looking for a working model or a replica model mocpages would be the best site. Just type in what gun your lookin for with instructions and bazinga you have instructions. YouTube is good to but sometimes it is hard to figure out what they want you to make. If you don't have a lot of pieces go to brickgun and buy the kit to make the weapons. Brickgun is limited on what weapons they have
Yes, guns shoot bullets
You shoot the guns that are attacking you. After you have shot all three dun turrets, the door opens.
A Machine
They either buy it seperately or from a Lego set.
The guns used in war to shoot down planes are called antiaircraft guns.
LEGO and brickarms are not connected, but brickarms makes their own LEGO guns that are compatible with LEGO especially the minifigures.
Only Space Rangers have guns.
If you go to www.brickarms.com they have increbidle Lego guns!(do not be discouraged by the prices($2-25 cents), they are AWSOME!!! Another website is www.brickforge.com, which makes guns as well as other minifig acessories.
guns that shoot.
"Ah, shoot, I left my homework at home!"Guns shoot bullets. People shoot guns.
a license
You can shoot it with a blaster or just simply hit it with a lightsaber... ;)