Knex Grenade (High Explosive)

A knex grenade with a explosion, but less fragments than my fragmentation grenade.
Pros:
-Huge explosion. Can scatters pieces all over a room.
-Easy to refill.
-Small, easy to conceal.
-Has a working pin.
-Won't explode unless pin is removed.
Cons:
-Not many fragments.
-Hard to build.

Warning: Wear eye protection!

Step 1: Step 1

Gather the following peices:
2 Rubber bands
Connecters:
2 white
4 dark gray
4 red
Rods:
2 blue
4 white

Step 2: Step 2

Assemble the following:

Step 3: Step 3

Wrap what you made in step 2 with a rubber band as shown in the following images:

Step 4: Step 4

Fill the grenade as show in this video: http://www.youtube.com/watch?v=W40CQ4e8xws

Step 5: How to Use

Eye protection is strongly recommended!

1) Pull pin (the rod sticking out of the grenade)
2) Throw!