http://www.sigsauer.com/CatalogProductDetails/p516-10-pistol-with-sb15-pistol-stabilizing-brace.aspx Ten inch barrel AR pistol, piston system with 4 position valve, with "stabilizing brace". I've wanted an AR just to have one, but I am not a fan of ARs for self-defense (didn't like DIG, felt the platform was too fragile compared to AK, etc.), but they are superior platforms for accuracy and I do like the ability to swap out uppers - which is why I would want the "pistol" version so I could run it with the 10" barrel and brace, then make it a rifle by putting on a 16" barrel (maybe something like 300 BLK or something like that for pig hunting) - maybe someday if I get real ambitious, an upper with an integral suppressor, or just put a suppressor on the short barrel. I like the piston system, I like the 4 position valve, I like the full length rail (I am a big fan of scout scopes), I like the BUIS) I like the SIG name (or Colt, or S&W) - I prefer not to build my own - I think there is value in having an off-the-shelf platform and modifying it from there. The fact that I will pay more is not a huge consideration for me.