The F-1 Lego Grenade + Rocket Projectile Launcher

This is the instructable for my grenade/ rocket projectile launcher. The gun shoots my own kind of big projectile (a rocket), but also shoots a knex fragmentation grenade by https://www.instructables.com/id/Project-X4-XPLODER-Mini-Knex-Hand-Grenade/

Some pros of this launcher are:
-very strong
-can shoot many different projectiles, of different sizes
-accurate(for a grenade launcher)
-range of 25+ feet (depending on what RBs you use)
-the rocket has lots of stopping power
-looks cool

Cons
-long reload time (about a minute)
-no magazine (single fire)
-the top moving panel is annoying
-fairly heavy

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http://sites.google.com/site/bblegobrickworks/

The launcher uses a lot of rubber bands (about 10, but depending on the rubber bands, you could have less). The instructions for the rocket is also included.

Step 1: Trigger Holder

Easy

Step 2: Underside

This is the underside of the launcher, as well as the underside support for the rubber band holders.

Step 3: Bottom of the Barrel

This is the 'run way' of the rocket. The lengths are: 6x52 (except for the back part with the hole)

Step 4: Trigger Mechanism

This holds the firing rubber band on one end, and the counterweight rubber band holder on the other side.

Step 5: Building the Sides+back

The front may look weird, but just follow the steps.

Step 6: Rubber Band Holders+ Attaching

These hold the rubber bands in place when firing.

Step 7: Putting It All Together

Put together the underside, trigger holder, and barrel.

Step 8: Top Cover+Sight

The top cover is really easy to make, and you can use whatever sight you want if you dont like mine.

Step 9: Underside Rubber Bands

In this step, I used 3 Rubber Bands, but you may have to use more (or less) depending on the strength of your rubber bands. I also used a rubberband to hold the top flat.

Step 10: Attaching the Firing Rubber Bands

I used 6 Rubber Bands- 2 Sets of 3 Rubber Bands. Each set has 3 bands knoted together into a chain.

Step 11: Ammo- Rocket

This is an easy rocket to make for the launcher. To fire, just put it in front of the trigger with the rubber bands loaded. Another alternative is a fragmentation knex grenade which I DID NOT MAKE. Its called the X4 Xploder, by Darth Trainman, which works with this launcher as well. Heres the link to his instructable: https://www.instructables.com/id/Project-X4-XPLODER-Mini-Knex-Hand-Grenade/.