The ProMag AR-15 Magazine delivers reliable performance with 30-round capacity for 5.56x45MM and .223 caliber rifles and carbines. Built with a hybrid steel upper and polymer lower housing design for optimal durability and weight balance.ProMag AR-15/M16 Compatible Magazine30-round capacity for 5.56x45MM and .223 caliberSteel upper with black oxide finish polymer lower housingProprietary DuPont Zytel-based polymer constructionHeat-treated chrome silicon wire magazine springInjection molded magazine followerMade in USA with lifetime guarantee against manufacturer defectsPerfect for AR-15 and M16 platform rifles and carbines this magazine combines American manufacturing quality with precision engineering for consistent feeding and reliable performance in the field or at the range.