First, let me say I highly recommend this holster. Next, let me say I am using a Kimber CDP with a 3" barrel in mine. I initially worried that the 3" Kimber wouldn't lock up tight in the Serpa. But since Serpa's lock on the trigger guard, slide length is not really a factor, so I trimmed my Serpa to be flush with the end of my Kimber. The pistol will wiggle a little in the holster, but you simply cannot get it to come out unless the release is activated.
Using the paddle, this is probably the most comfortable holster I have ever used. My various leather holsters *look* pretty compared to the plastic Serpa but daggone if the Serpa isn't the toughest, most secure holster I have. Once I trimmed it, it is also the most compact. I holds my Kimber in a fairly high ride and I can cover it with an untucked t-shirt when wearing jeans.
Pros: Seemingly indestructable
Cons: Allows movement in holster
This review was written in the old system and had content requirements that are different than reviews written today.