Hello Everyone, if you're like me and you like realism within airsoft, then you probably either have or want a GBB rifle or pistol. I own several GBB Pistols and one GBBR. I use green gas most of the time and used Propane once but just couldn't stay with it due to the smell. I guess some people get used to it so I'm thinking of going back, with an idea. Changing the smell of propane. How am I going to do that? By Aroma Oil. See, at first I thought of spraying some Febreeze, but two reasons that wouldn't work. First off, its gas. Second, it won't fit in the adapter. Thats why I'm thinking of using aroma oil to kill the smell. By placing Silicone and Aroma Oil within the adapter, I hope I would be able to act just like green gas, yet it smells good! I haven't tried this theory out yet and I'm planning on doing so soon, but I would like to hear feed back from everyone first. If you do not mind, please give a reason to your answer! Hopefully this helps! Thanks!