The Amend2 30-round magazine is a sturdy, reliable 5.56x45 NATO (.223 Remington) AR15/M4/M16 magazine made of an advanced polymer material. It is a light, durable, and excellent alternative to the standard M4/M16 USGI aluminum magazine. The magazine comes in a variety of colors including Black, Flat Dark Earth, OD Green, and Gray. Product Features 30-round magazine. Sturdy, impact-resistant polymer with textured grip. Anti-tilt follower. Heavy-duty, non-memory, and non-corrosive stainless steel spring. Made in the U.S.A. Material able to cerakote. Product Specifications Manufacturer: Amend2 Model: Ar-15 Caliber: 5.56 Nato / .223 Rem Magazine Capacity: 30-Rounds