The Superlative Arms AR-15 Adjustable Piston System with a solid .750'' gas block offers precision and reliability for your AR-15 platform. Designed in a sleek black finish this mid-length gas system ensures optimal performance and adaptability providing enhanced control over gas flow for improved shooting experience. Perfect for those seeking to elevate their firearm's functionality this piston system is tailored for left-handed users adding convenience without compromising on quality or durability.