1. First, combine the main body with the spring, and press both sides of the main body to the middle at the same time, and then install the locating pin on the main body;

2. Press down the needle sleeve and install it. It should be noted that during installation, it is necessary to ensure that the positioning pin and spring are not bounced off when sewing the needle sleeve, and then the protective sleeve is sleeved on the ceiling artifact;

3. Then continue to install another spring with larger volume, then install the launch tube on the main body, and then fix the silencer gun on the ceiling artifact, tighten it at the same time, and rotate it to the right to fix it;

4. Finally, cover the ceiling artifact with a dust cover to prevent the ceiling artifact from being affected by dust accumulation and prolong its service life.