On the Silhouette, Unlimited, and Bullseye (not sure about the Varmint or the Target) there is a recessed hex bolt in the top rear of the tang inside the slide. Using an Allen-type wrench, you can adjust the trigger weight by screwing in or out the bolt. Of all the adjustments I've made on my Unlimited and Bullseye, I've seen very little difference in the weight or crispness of the trigger then when it came out of the box. Maybe I'm doing something wrong.
