very powerful when you use the green rod.
Step 1: The barrel
you need 20 gray half circle pieces.6 gray one way connectors. one orange 2 way connector. 3 little black rods. 2 black one way connectors. 2 white rods. 1 90 degree connector.2 2 way connectrs (gray). and one black thing (see pic) assemble by picture. Almost forgot and six blue rods.
Step 2: The handle and stock
build this using the picture.
Step 3: The bolt
just use the pic there is tape on the orange piece connecting to the yellow rod.
Step 4: Assembly
just use the pics.