I have a GP 160. It's a limited re-release of the earlier 6" GP100's with the half lug barrel.
I have old eyes, so I replaced the original front sight with a new factory sight with a red insert.
I can keep most shots in the 10 ring at 25 yards. At seven to fifteen yards, it makes one big hole.
It's stout and dependable and I think the half lug makes it a bit more handsome.