The model 253 is BKL's most versatile scope mount. The 253 fits Bolt-Action, Semi Automatic, and Lever Action rifles and pistols. This 3/8" dovetail scope mount has BKL's new clamping system and incorporates two scope rings into a unique unitized base that is easy to install, adjust, or remove. The base clamp length of 1-5/8" provides a solid and stable mount.