The Magpul Industries MAG557-MCB GEN M3 30-Round Magazine offers unmatched strength and reliability, designed to meet military performance standards. Built with advanced material technology and manufacturing processes, this magazine enhances durability while ensuring consistent performance in the field. 30 round reliability with no stoppages Anti-tilt, Self-lubricating Follower Stainless-steel Spring for Longevity and Durability Paint Pen Dot Matrix Panel on the Bottom to Allow for Identification Elevate your firearm's capabilities with this essential magazine for optimal performance and reliability.