I have a Smith & Wesson, 15-22 that I love and shoot a lot. Scoped with a Nikon P-22 however, the stock sights are pretty good without the scope. The trigger is nice, but I have been shooting for accuracy more and more lately and would like to get a performance trigger. The Performance Center at S&W makes models of the rifle with a "two stage match trigger", but when I bought, I could not find one. Does anyone know what type of trigger they use in the Performance Center models? Can you buy it from S&W? I have heard that it may be a Rock River? If anyone knows, please fill me in. Thanks!