The Ruger Mk Series "Shadow" Picatinny Rail in black is a sleek and durable accessory designed for Ruger firearms. Crafted from high-quality aluminum this rail provides a robust and lightweight platform for mounting optics and accessories. It is compatible with a range of Ruger models including the 22/45 Mark I Mark II Mark III and Mark IV. The one-piece Picatinny style ensures a secure fit and easy installation making it an ideal choice for enhancing the versatility and performance of your Ruger pistol.