The stainless models are worth the extra pennies. I bought a blued 22/45 threaded barrel model because I couldn't justify paying another $300 for a Tac Sol threaded upper or paying to have the barrel threaded. I am putting a suppressor on mine and it will be a fun plinker instead of a survival weapon. But if survival is your key motive for buying a Ruger rimfire pistol, heed Arch's advice.