Steve, what IS a grip safety? I can't say I have ever seen a safety other than a sliding "stalking" safety that was, I think more for reloading than anything else.
And, of course, the half cock or rebounding hammer safeties, but no grip safety.
2-piper, I have yet to see a delicate or easily broken half cock safe. Most that I have inspected are fairly robust like those shown on the Butler locks above. They do wear however, and some of cheap guns have had half-cock issues, but breakage of the type that results from falls, etc., I hear about on the net but have never seen.
I don't see anything in the above photos that I can identify has a grip safety. Do you have some photos, or what am I missing?