This Volquartsen Custom chambered in .17 Mach 2 was made as a one-off for a client of mine by Volquartsen.  This is not a Ruger lower with a Volquartsen upper on it.  She comes with the C-More sight you see pictured and 500 rounds of .17 Mach 2 ammunition.  If this is your speed, it doesn't get much better than this weapon.