rear toggle weak point?

[G.T.]

Thanks Tom and John, I certainly can understand the receiver crack, I was just wondering about the toggle integrity, if one was to modify it for a rear sight attachment? I would certainly not want to alter a part that was inherently weak already... I have seen many a sight just bolted on, sometimes dovetailed in, and sometimes in the real custom jobs, built up and machined in... Anyones thoughts on this?? Best to all, til...lat'r....GT