I waited a month before I could get my hands on a M60 and M60L, and it was worth the wait. Don't forget, Gene is a one man team, so if he's sick, has family obligations, or feeling lazy ... he will not have any available for the week. Sometimes he'll have just M60s drop in for one week, and the next week, he'll dedicate himself to making Mag drop ins.
It is getting better though ... from what I heard, he quit his day job and dedicated in making drop ins (correct me if I'm wrong). A couple of weeks back he made 100 M60 and took about 1 week to sell out. As other members have said, sign up for his newsletter.