Elevate your shooting experience with the Magpul Industries MAG556-MCB Polymer Magazine, featuring the innovative MagLevel System. Constructed from advanced polymer, this magazine offers superior durability and a transparent body for quick round counts while maintaining exceptional reliability. Anti-tilt, Self-lubricating Follower Stainless-steel Spring for Longevity and Durability Paint Pen Dot Matrix Panel on the Bottom for Easy Identification Anti-glare Translucent MagLevel Windows Upgrade your gear with a magazine designed for performance and ease of use.