I own both Katana types wielded by both the movie and TV Highlander (Connor Macleod and Duncan Macleod).
The Connor Macleod katana is not really a prop, but a real sword with carbon steel. I have to oil this on a regular basis or else it will rust.
It is like the one in the movie, down to the dragon carving.
I have the Klingon Honor Blade, or that is what we called it when I played FASA's Star Trek RPG. It is now called the D'k tahg.
With a flip of the button, the guard flips out.
Star Trek II and III made a great impression on me as a teen, and the modernized Phaser II-B is still a favourite.
Han Solo's DL-44 Heavy Blaster pistol.
It even makes that blaster sound when you pull the trigger.
Stormtrooper E-11 Blaster Rifle
I actually painted this from a kit I bought off ebay. The E-11 of course, is based on the British Sterling SMG, which I fired actually when I was in the military. Very crude SMG to be honest, but when turned into a prop, it looks good.
Luke's Return of the Jedi's lightsaber. A very elegant weapon indeed.
The Old West
These props are not working weapons, but metal replicas. They have the same weight but are props nonetheless.
Colt. 45 Peacemaker
These props make that satisfactory "click" sound when loaded and fired that you see in Spaghetti Westerns.
Colt Navy, 1851
It had brass parts so it wouldn't rust at sea. A very popular weapon on both sides of the Civil War.
Colt Dragoon 1848 (Dragoon .44)