Experience unmatched reliability with Ammunition Storage Components 10-223-SS-BM-O-ASC magazines. Crafted to meet the demands of even the most rigorous shooting conditions, these magazines are engineered for optimal performance and durability. The ASC magazines feature robust construction with superior components. Each magazine undergoes rigorous quality control processes, securing their position as the preferred choice for leading firearm manufacturers in the U.S. Heat Treated for Strength and Durability Chrome Silicon Spring Made in the USA Choose ASC magazines for reliable feeding and exceptional longevity.