Mountain Tech Rail Features Cnc Machined From 7075/T6 Aluminum For A Lightweight Rugged Foundation. Mil-Spec Hardcoat Anodize For Durability And Scratch Resistance. Rails Feature Self Centering Black Zinc Coated Hardware For Precise Alignment To Your Receiver And Corrosion Resistance. Mountain Tech Rails Utilize The Nato Accessory Rail Interface Standard stanag , And Are Weaver Style And Mil-Spec 1913 Compatible. Fits Ruger American Short Action. Mountain Tech Rail features CNC machined from 7075/T6 aluminum for a lightweight rugged foundation Mil-Spec Hardcoat anodize for durability and scratch resistance Rails feature self centering black zinc coated hardware for precise alignment to your receiver and Mountain Tech Rails utilize the NATO Accessory Rail Interface standard STANAG , and are Weaver Fits Ruger American Short Action