I have tm m4 lowcaps that are over 12 years old and they still work fine. All my other lowcaps (tm) are about 5 to 8 years old. Funny thing is that my tm based ak ( that i got well used 10 years ago) is even older than it's mags......
Vondnik, team Bad Karma, PQAC
Murphy's second rule: Nothing is impossible for the man who does not have to do it himself.