Quick and Easy One Point Sling!

So I was walking around with my Daisy Pumpmaster BB Gun, and was wondering if there is an easier way to carry it.  I found a piece of string and this idea was born! It's quick, and I would NOT recommend using it for an actual firearm.  Also, I am not liable for any damage you cause upon yourself. Thanks :)

This pretty much costs nothing, unless you want to go buy a B.B. gun (which I recommend)
You need: 
A length of string- mine was 70 in. long, paracord would also work great.
A B.B. gun or similar thing- this would work for a Re Rider or even a Nerf gun, but i still do not recommend using an actual firearm.
Two hands. Self explanitory.

This knot is a basic double-overhand, but pictures are added.  The other end is a square knot, and another overhand is used to catch the slack in case i need to loosen.

You are done!  It may need adjusting, but mine fit all right.
Here are some pictures on how it's worn.
Sorry they're sideways, it's a phone camera.
Happy Carrying!