You must be logged in and verified to contact the designer.
Connector parts to help you modify the Nerf N-Strike Elite StrongArm so that it has three rotating cylinders. The full instructions on how to use these two parts to modify your Nerf StrongArm is located here:
Nerf equipment used for illustration of these connector parts are not included. You can get the Nerf N-Strike Elite StrongArm from Amazon here:
Disclaimer: Please use discretion when installing custom parts as fit and compatibility may vary. Some modification may be required. Professional installation recommended.