It comes with a black anodized, CNC machined aluminum bottom metal and trigger guard.
The bottom metal was developed with quality and performance in mind. 308, 6.5 Creedmoor, and other popular short action calibers. The precision style AI magazine quickly made its way into a few of the popular American Rifles, including the Predator and Go Wild® models chambered in. In Early 2017, Ruger released the AI-Style magazines for Ruger Precision Rifle® and Gunsite models. Boyds has recently released a bottom metal that allows the Boyds stocks to accept the Ruger American rifles with the AI-Style magazines.
Press Release: Boyds Adds Bottom Metal for AI-style magazine Ruger American Rifles