Quote Originally Posted by Hsing-ee View Post
I like them but when manufacturers ditched leather and 'O' rings and took up nylon parachute seals like the Feinwerkbau Sport had been wearing since the early 70s power went up 25% and the running-in time dropped to a tin of pellets instead of 20,000.....
What is the life expectancy of the Nylon? Will it deteriorate with age?