A simple yet effective grenade. It has a "door" in front, a hatch for putting ammo in (on the back), and a pin that is locked in place. This grenade is also very small and easy to build (perfect for beginners).

Step 1: Required Pieces

To make this grenade, you need:

Rods:
white: 3
Blue: 2
Yellow: 4

Connectors:
Grey, 1 slot: 3
Yellow, 5 slots: 6
White, 8 slots: 3

Misc.:
Black "Y" connector: 2
Black socket connector: 1
Tan connector: 2
Grey spacer: 1

Step 2: Building the Body

Yeah... pretty self-explanatory.

Step 3: Building the Door

Again... easy peasy.

Step 4: Building the Pin and Hinge

Yeah... easy.

Step 5: Building the Hatch

>_> need any more explanation?

Step 6: Putting It Together

Attach like so. The bottom of the door (the side without the gray connector) should just rest into the y connector on the body. When the door is in place, push the pin through until it clicks into the socket connector. (images 2 and 3 are different angles.)

Step 7: Loading the Grenade

You are finished! To load the grenade, push up the blue part of the door, insert green rods, and close the hatch. When you are ready to throw it, hold the grenade vertically in your right hand with the door facing away from you. Next, pull the pin slightly towards you, and then out. This will release the door. Finally, chuck it at your target. Have fun!