The SureFire MAG5 is a high-capacity magazine for 223 Remington/5.56x45mm ammunition, and it is compatible with M4/M16/AR-15 variants and firearms compatible with STANAG 4179 magazines. The MAG5 is made of Mil-Spec hard-anodized aluminum, and it feeds smoothly and reliably without lubricants. The long-lasting springs are cadmium-coated for low friction and excellent corrosion resistance, and the magazine can be easily disassembled without tools for cleaning. This SureFire magazine provides distinct tactical advantages and is less bulky than drum mags, enabling a normal weapon grip.