These are designed to replace the orange tips of the Nerf Star Lord Quad Blaster. These barrel tips render the gun incapable of firing Nerf darts, but also still allow the gun to open and close because I thought that was a really neat functionality of the base Nerf gun. You can use the exact same screws you removed from the original orange tips to affix these replacements. Some modifications to the base blaster are required to fit the top barrel into place. Specifically, you will have to trim some of the inside of the barrel cover (the part that moves) away. I did this with a Dremel, and would recommend you do the same - it makes it a lot easier. Each barrel is designed with two 5mm holes to accommodate LEDs. How you go about doing that is up to you, but I've discovered the best effects (in my opinion) can be obtained by filling the barrels with clear resin to help diffuse the light fully down the barrel.
Download File – starlord_nerf_barrel_adapters.rar – 329 KB