Mounts onto Ruger models that have the Ruger Ring Mounts machined onto the top of the receiver. To include Mini 14, Mini 30, PC9, and PC4 rifles and carbines
B-Square 1" High Scope Extension Rings, Fits .22 rimfire/airgun (3/8" dovetail) style Bases. Allows Scope To Be Moved Forward Or Back For Proper Eye Relief