NcStar QR Riser Gen2 features durable aluminum construction with a black finish. Measuring 5.30 in length with a mount height of 0.75 and weighing 4.20 oz, this base provides a secure rail interface for optics mounting. Designed with a locking quick detach mount type, it delivers a precise base style for AR15 and M4 firearm platforms. Engineered to fit standard Picatinny rail mounting systems for fast, reliable installation and removal. 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.