The TW-Series AR2PM Scope Rail Mounts from BSA Optics provides a stable Picatinny/Weaver mount for 1" diameter barrel scopes. The two-piece set provides a great amount of placement versatility on your rail. Depending on the scope you use, and the eye-relief, you can place each scope mount where it best fits you, your scope, and the available space on your rail. The mounts provide a 20 MOA rise from the rail. The aluminum mount comes ready to install in clamshell packaging.