The S402 Grand Slam Base is a versatile and durable one-piece base designed in a sleek black finish. Crafted from high-quality steel it fits a wide range of firearms including models from renowned manufacturers such as Browning CIL Colt Cooey H&R Herters Marlin Mauser Savage Arms Sears Voere and Winchester. This weaver-style base is compatible with various models like the Browning 53 and BBR CIL 950 and 972C Colt 57 and many others ensuring a secure and stable mount for your optics enhancing precision and reliability in your shooting experience.