NcStar 45 Degree Offset Rail Mount features precision aluminum construction with a black finish. Measuring 1.80 in length and weighing 1.40 oz, this base provides a compact rail interface for tactical optics and accessories. Designed specifically for AR firearm platforms, it features a 45 degree offset base style compatible with both Picatinny and Weaver mount type systems for versatile positioning. Safety Note Always ensure the firearm is unloaded before installing or adjusting any optics or bases. Verify proper torque specifications during installation. Improper mounting may affect accuracy and safety.