I had a ciener kit and it worked fine, and was decently accurate, found a deal on a Marvel, with both open sight system, and optic sight system for a good deal, and it works well, and is very accurate. The downside besides initial cost, was the magazines, as the Marvel uses Colt Ace mags, 50 bucks + apiece, But then I read they could use, ciener mags, and since I had some, tried them and they do work well, and less expensive, + at least for now, come in 15 round increments.