ok so i made myself an electric barrel cleaner like the kind that you can buy for $100 bucks out of stuff at home depot using a post i found online and it works GREAT! on my rem 700 police. but now im trying to use it on 1 of 5 yugo parts kits that i just got and the liquid cleaning solution that you pour down the barrel leaks out of the gas tube. So i covered the gas tube with a latex glove finger and it sealed the port but now apparently its leaking out of the pin that pivots and holds the grenade launcher to the gas tube. F*ckkkk!!!!. i dont have any idea how im going to be able to clean this thing now. Is there anything that i can stick through the gas tube port that will stick into the barrel and plug it or is there any way that i can make this thing watertight? id appreciate any suggestions no matter how crazy they sound. Thanks! jason.

Put the grenade site in the up position. This should shut off the gas port from the barrel.  Also, put a cork in the gas block.