How to Fix a VM's Leaky ASA

VM-68 ASA

After years of use, a leak can sometimes develop between the ASA and the gun body. There are a number of temporary fixes, but if you want to stop the leak for good, read on.

Getting the ASA off is the first and hardest step. Start by boiling a pot of water. Then, when the water begins to boil, turn off the heat. Submerge the front of the gun in the water and hold it there for a few minutes. The hot water will loosen up the thread locker that is holding in the ASA. You may want to strip the gun first before doing this so that you don't ruin any o-rings or seals. After the body has been sufficiently heated, the ASA should come off fairly easily. A strap wrench works well for this. If you feel you need to use vise grips try heating it up more first. Vise grips should only be used as an ablsolute last resort. They shouldn't be needed.

Once you have the ASA off and it has cooled down, clean both the threads on the ASA and the threads in the gun body. A dental pick works very well but anything pointy should work. Check the threads for damage or corrosion.

After that, use high strength red thread locker on the ASA's threads and the threads in the gun body. Make sure they're clean and dry first. Firmly screw the ASA back into the gun body and let things sit for 24 hours.

After the 24 hours are up, air up your VM and check it for leaks. If for some reason you still hear a leak but can't locate it, try putting some soapy water around the ASA and look for bubbles.