The PROMAG Drum AR-15 9mm 30rd Black Polymer is an innovative and high-capacity magazine designed for AR-15 rifles chambered in 9mm. With a generous 30-round capacity, this black polymer drum magazine ensures you can enjoy extended shooting sessions without constant reloading. Crafted for reliability and ease of use, it's an essential accessory for your AR-15 9mm conversion, providing ample rounds for your shooting needs.