Make sure you're prepared for those extended battles, and pick yourself up a spare 40 round magazine for your GHK G5 Gas Blowback Airsoft Rifle. This magazine is constructed out of a durable nylon polymer with ergonomically designed finger grooves to provide optimal grip when hastily changing magazines during battle. Full metal internals alongside a high tension spring efficiently and smoothly feeds BBs from the magazine into the firing chamber. This magazine is green gas/propane powered, and can be used in almost all climates while maintaining the same performance level. Run onto the battlefield confident you have what it takes to come out on top.