Two years ago I purchased a NAA Black Widow .22 mag. I carry the weapon in a gun pouch, a protected environment. Upon inspecting it a few days ago I was shocked to find the barrel rusting. This gun is supposedly made of a high quality stainless steel. I'm 69 years old and am a retired Senior Reactor Systems Engineer. I have had a life time of experience with stainless steel. The only way stainless rusts in a protected environment is if it contains impurities and the NAA weapon I have has a LOT of impurities. Has anyone else had similar experiences with NAA weapons?