This is my latest crossbow, the A-1 Light. This crossbow is fairly small, however it is extremely powerful for its size, depending on what rubber bands you use. I got a 2x2 lego brick to go 30 feet! The crossbow is only about 8 inches long. It doesn't require many pieces compared to my larger and heavier crossbows. It is also suprisingly accurate as well!
Check out my Website for all my Lego Guns http://sites.google.com/site/bblegobrickworks/
Check out the youtube video of the A-1 shooting some cans:http://www.youtube.com/watch?v=nnt1XAG2dfs