I have recently purchaced a 21 to go along with my 30. I felt that being a person who prefers a 45 this was the logical choice for the fact of their usage of the same holster (ccw) and Mag interchangability. My 30 happened to be on the list of the Glock recall, so I have not been able to test the two in a verses cenerio on accuracy. Has anyone done so in reading this? and what other Pros and cons have you found.