ProMag AR-15 RollerMag Magazine, 5.56 NATO/.223 Rem., 30 Rounds - Black Overview The ProMag AR-15 RollerMag delivers flawless feeding and long-term reliability for AR-15 platforms chambered in 5.56 NATO/.223 Rem. Featuring the innovative anti-tilt ROLLERFOLLOWER system and durable DuPont Zytel polymer construction, this magazine is built for smooth operation and rugged performance in demanding shooting conditions. Key Features 30-round capacity for 5.56 NATO/.223 Rem. ammunition Proprietary DuPont Zytel polymer body for superior durability Patented anti-tilt ROLLERFOLLOWER reduces friction for smooth feeding Heat-treated chrome silicon wire spring maintains strength over extended storage Designed for AR-15 rifles and compatible platforms Made in the USA for assured quality Specifications Caliber: 5.56 NATO / .223 Rem. Capacity: 30 rounds Material: DuPont Zytel polymer Spring Type: Heat-treated chrome silicon wire Finish: Black Type: Detachable magazine Model Fit: AR-15 platform rifles Series: RollerMag MPN: RM-30 UPC: 708279012204 Applications Ideal for tactical training, competitive shooting, and range sessions where reliable feeding and long-term performance are essential. Additional Features ANTI-FATIGUE spring design allows magazines to remain loaded for extended periods (up to 6 years) without loss of function Lightweight design for ease of handling without compromising strength