Cybergun 21rnd CO2 Magazine for KWC FN 509® GBB Pistols

If you notice a performance dip during cold-weather skirmishes, you need a CO2 magazine! The Cybergun 21rnd CO2 Magazine is designed for Cybergun & KWC FN 509® GBB Pistols; compatibility with other models cannot be guaranteed. The magazine is standard length, holds 21 rounds, and is a direct replacement for the magazine that comes with the pistol. The magazine can be filled with BBs from the top or front, and CO2 bulbs can be installed through the side of the shell and tightened using the included Allen key through the baseplate. If you're looking to up your winter skirmish performance, or just want a more reliable year-round experience, the Cybergun 21rnd CO2 Magazine is exactly what you need for your FN 509® GBB Pistols!