The Superlative Arms AR-15 Adjustable Gas Block is a precision-engineered upgrade for your AR-15 rifle designed to deliver superior performance and customization. With an inside diameter of .875 inches this clamp-on gas block is crafted from durable stainless steel ensuring resilience and longevity in any shooting condition. Its adjustable style allows for fine-tuning of gas flow optimizing your rifle's performance for various ammunition types and shooting preferences. Experience enhanced control and reliability with this high-quality easy-to-install gas block perfect for any AR-15 enthusiast seeking to elevate their shooting experience.