This is my Knex magazine, it is is spring loaded it holds 7 green rods and is no more than 5 or 10cm tall.
Step 1: Making the Bass
this is the bass of the magazine. just copy what is on the pictures.i apologise about the second picture but all you do is attach 2 yellow pieces on either side of the orange pieces.
sorry about the picture again but you should be able to see everything I've done.
just make the piece pictured and attach it like it is in the second picture.
again sorry about the pictures but just make the firing pin in picture 1 (you can use different length of rods) and attach it as shown in picture 2. and there you have your magazine.