Haha that's the most obvious part nobody mentioned. It's a little allen screw that you remove then you should be able to twist it off unless the glue isn't melted. If it doesn't twist then boil some water (I find you have to boil with G&G) and leave it in the water for a good 2-3 minutes. Use some pliers and twist it off. Make sure you remove the inner barrel and hop up just incase. Once it starts twisting it should become easier and easier. When you are done twisting it off take a paper towel and wipe off the excess glue left on the threads.