Step 1: Materials
1. An airsoft pistol (dddduuuuuuuhhhh)
2. An adjustable belt (one without the holes, you need the ones for flag football)
3. A knife or a pair of scissors (with a point)
4. Vinyl basket (most dollar stores sell them for a dollar or two each)
Step 2: Cuts, This Way and That
You will need to cut out the entire bottom of the basket, this way the gun can fit through and it makes the holster ambidextrous. ( you could just cut out one half, but they work the same either way). You will also need to cut two slits about 1 inch apart on the front and back (in the middle area) so the belt can slip through.
Step 3: Slip It in Nice and Gentle Like
Step 4: Finish
You can also slip an extra mag behind the holster itself.