Handguns can look good with added sights but rarely in the tacticool sense people want them to.
Take for example the Longslide 1911 w/laser sight from Terminator.
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What you see pictured is a modern functional replica costing $5000. Notice how the laser sight connects right to the grip rather than up through the sleeve to a battery pack like the original. The sight is fully functional but obviously its unnecessarily large and provides no tactical advantage over a modern laser sight. However it does look cool.