Bolstered floorplate is set flush so it will not catch on other magazines or bulk up when stacked or pulled from a pouch. Feed lips and anti-tilt follower are reinforced for strength and don’t require a clamp to keep the feed lips from spreading when loaded for extended periods of time. Aggressive scale pattern for enhanced grip in wet conditions. Compatible with all M4, M16/AR15, HK416® and FN Scar® rifles and carbines. Crafted of a military-grade, chemical-, biological- and impact-resistant polymer. Per 3. Made in USA.