I seem to recall that when I was working in the G&H store about 10 years ago that there was a notice from B. Rizzini about the possibility of the forend latch coming off. I spoke to Paul Chapman and he says that we have replaced several of them. Apparently, there is a set screw that can come loose.

Bob Beach

Research
Griffin & Howe, Inc.
http://griffinhowe.com/researchyourfirearm/