I'm looking at the Desert Tactical Arms SRS. A friend of mine turned me onto it but I've never seen or had the chance to shoot one. I love what I see on the website in that they have made it very compact and light weight without sacrificing accuracy. At least they claim. I'd love to hear opinions of anyone who owns or has any experience with one before I commit. I'd also like to know about caliber conversions, what is the change in POI and how easy is it to switch.