Morning All- have been looking at underhammer rifles on the net.Beautiful and simple system.From my very limited impressions i gather they were not all that common.Given the simplicity and ease of manufacture (and one would think lower cost) of the lock I find it surprising that they were not a lot more popular.Are there any reasons for their relative lack of popularity compared to a side lock? I think I see one in my future but they are rare as hens teeth in australia--cheers zodd