I ordered and received one of the EGW mounts for GP100. It's decent in my opinion. It's tight to the gun and seems strong, of course time will tell just how stong. I'm not impressed with the fit of the mount. There are several areas where the tolerances could be tighter. I think it's more an issue of looks over function but I'll take some good close up photos and post them. Now I have to decide on a sight.
Later,
Stephen