Hi
Several times Ebay has had "silhouette" sights, that were not!!! The T/C Silhouette sight mounts on the top,with a dime sized, numbered, elevation wheel that you can adjust with your fingers. It also has a wheel on the back side so you can adjust the width of the rear sight. The front Silhouette sight has four blades on a wheel. So you can choose the width you want. That is what my Silhouette sights look like, and I have never heard of a forearm for Silhouette. There are lots of different styles of forearms, some that lend themself to laying along side of your leg.
My two cents
jim