Warne vapor rails are designed to offer shooters an affordable and reliable mounting platform manufactured for your specific firearm.The v484-20moa offers 20 moa of elevation built in for longer distance shooting.Fits picatinny & weaver style rings and are nato-stanag compatible.Designed and made in usa. Model: Ruger American SA Vapor Picatinny Rail Material: CNC Machined 6061-T6 Aluminum Action: Short.