The Superlative Arms AR-15 Adjustable Gas Block with a .625'' inside diameter and a durable Melonite finish is designed for the discerning AR-15 enthusiast. Crafted from high-quality stainless steel this adjustable gas block offers superior corrosion resistance and longevity. Its adjustable style allows for precise gas flow control enhancing your rifle's performance and reliability. Ideal for customizing your AR-15 this gas block provides both functionality and durability for a superior shooting experience.