Ruger Mini 14 Scope Mount New! Sun Optics USA P/N 4502 Fits 181 Series And Later. Installs by replacing the bolt stop cover plate. Mounting Instructions And All Necessary Hardware Instructions Included. Made of 6061-T6 Aircraft Grade Aluminum. See under type allows use of guns sights. Picatinny style rail allows more eye relief than simular mounts. Attaches by a single knob to the threaded cover plate. Black matte finish. Lifetime warranty by Sun Optics USA