very powerful when you use the green rod.
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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.