This magazine is slimmer, lighter and much easier to use than other rotary rimfire magazine. The 10-round Double Helix is engineered with a torsion drive spring and interlocking gear design to maintain accurate timing and precise cartridge alignment for smooth, reliable feeding. The translucent gray (smoke) body allows you to easily verify the number of remaining cartridges. Ammunition can be removed by moving the exposed gear back slightly to gently drop each cartridge without tools or scraped fingers