How to make Hopperbin weapons?

So, there's this guy named "Vinya" on ROBLOX, he made the "Wastelanders" games.

In these games, he has made some awesome Hopperbin weapons.

I want to know how I can start making my own Hopperbin weapons, sorta like his.

Any actual answers would be a big help, thanks.

How convenient, I actually did this earlier today!

Here's what I did (I'll have a link to a very crude model at the end of this answer)

• Set up functions for selecting / deselecting the hopperbin
• made a model that I wanted to act as my tool (then put it in ReplicatedStorage)
• wrote some code that would weld the 'tool' to the characters arm and parent it to the character
• wrote some code to reverse that on deselect

If you're not very experienced with scripting, this is a bit more difficult to make than a normal tool (as you need script arm movements as well, because the way this works, the part will just follow your hand)

And lastly, here's the model: http://www.roblox.com/item.aspx?id=153471997