Thanks for the info guys. To me a 14.5 inch gun is short, so a 10.5 seems really short. And perhaps I’ve read too much about short gas systems being temperamental. But I can definitely see the utility. Once I get some trigger time I’d like to build it out in to a serious use gun—I can see a lot of situations where an AR platform can do things the 9mm or .45 I typically have can’t.