Seems to me that a nickel gun has just the right amount of fanciness for a tux.
Of course, if you want something a bit smaller you can't go wrong with a classic Colt D-Frame or S&W J-Frame.
Smith, and Wesson, and Me. -H. Callahan
Well waddaya know, one buwwet weft! -E. Fudd
All bad precedents begin as justifiable measures. -J. Caesar