DURAMAG SPEED™ magazine bodies are constructed of 6061-T6 aluminum and are type-III anodized to the mil-spec. This battle-proven magazine is lightweight, durable and feeds every time. DURAMAG SPEED™ mags have been the magazine of choice for OEM, Law Enforcement and Military Units throughout the world and are safe for extended storage while loaded. DURAMAG™ will not fl ex or swell like polymer. Available in 5rd, 10rd, 15rd, 20rd, and 30rd capacities and a wide range of colors for quick specialty load identifi cation or to match your next build.