Most aftermarket are quality built using billets of steel that are machined. Factory triggerguards are cast from varying materials, most quite inexpensive. Its all about quality. In days of old when guns were used and carried daily, they were subject to severe conditions. This is where high quality, hand machined guns shine. View the program "YUKON MEN", and you will notice how abused their guns get. Carried in boats with no gun case, used to push logs in the river, ect. They do have cheap guns as well, as in our throw away, when thing break, just throw it away. In pre WWII days a purchase was made to last a lifetime.