The Ruger Scope Base Adapter 90224 in silver aluminum provides a secure Weaver-style mounting platform for Ruger Mark I, II, III, IV, and 22/45 .22 caliber target pistols, enabling you to attach a scope to your pistol for improved accuracy and target performance. This 1-piece aluminum base is designed specifically to accept Weaver-style rings and features a durable, lightweight construction with a precise fit that aligns optics quickly and confidently, helping shooters optimize sight picture and repeatable precision during practice or competition. The adapter utilizes a three-screw installation that secures the base firmly to the pistol rail, allowing reliable ring mounting without altering the pistols balance or handling characteristics. While it is not intended for Ruger rifle scope rings, the base accommodates a variety of Weaver-style rings to suit different aiming systems and magnification needs, making it a versatile addition for serious .22 pistol shooters. With Ruger branding and a sleek silver finish, this scope base adapter complements the rugged design of Ruger Mark II, III, IV, and 22/45 pistols while providing a straightforward path to enhanced long-range accuracy and faster target acquisition.