I have an airsoft guan and one day I came with this, I was loosing lots ob BBs and I thought that this will be a good project becouse it catches perfectly you BBs so you can re-use them.
Step 1: Materials and Tools
-Plywood (I used thin one becouse my gun doesnt shoot too far)
-Nails and hammer
-Foam (This is to stop the bbs from bouncing outside again)
-Paper (For the target, I used the one that you put in the tables in the BBQs) You will need tape to place the paper with the target.
-Marker (To draw the target)
-Airsoft gun and BBs
-I recomend you to use a hot-glue gun to glue in place the plywood before putting the nails, this will make your work much easier.
Step 2: Measures
The plywood is very easy to work with, here are the measures:
1x-1m x 1m
4x-1m x 20 cm
1x-1m x 10 cm (this one is for retaining the bbs)
This are the ones that I used but you can create your´s as you want.
I also put two peaces of more width in the bottom of it so it stays stable.
Step 3: The Foam
Step 4: Target
Step 5: Finish
I hope this instructable helped you to get some ideas.
Heres a video shooting: