Lancer Tactical High Pressure 12 Gram CO2 Cartridges for Airsoft / Airguns (Multiple Quantities) - Pack of 5

Everyone needs these, but it's worth describing the one they're most likely to get wrong. The 12-gram CO₂ cartridge is the single most common gas source for airsoft GBB pistols and a handful of rifles, and this pack gives you five of them in the standard aluminum casing.

What 12 grams actually buys you. A single cartridge typically lasts between 20 and 40 shots on a GBB pistol, depending on how much gas you let bleed out on the trigger pull. On a rifle with a larger gas chamber, that number drops. Expect to go through one cartridge every two or three field sessions as a regular player, and plan on keeping a pack like this in your kit bag rather than reaching for it game day only. Cold weather makes the problem worse: the pressure inside the cartridge drops faster, and you'll get fewer shots per fill and more consistent blowback in warmer air than in the cold.

Metal casing matters. These are aluminum, not plastic. A plastic cartridge is designed to be punctured and refilled; an aluminum one is disposable and rated for one use. They are not interchangeable. If the gear at the field offers refill stations, those use a different product. This is the sealed, puncture-the-valve-and-throw-away type.

Universal fit. The 12g format is the industry standard for pistols and select rifles. If your gas gun takes a 12-gram cartridge, this fits. If it takes green gas, HPA, or a proprietary CO₂ format, it does not. Check the manual, but if you've been buying green gas for it, that's the wrong product entirely.

Storage note. Keep them sealed and cool. A cartridge left in a hot car or in direct sunlight builds internal pressure and can be dangerous to handle. Store a box at room temperature and you'll never have a problem. The cartridge is empty the first time you fire it — there is no second shot.

This is a five-pack. Buy more than one at a time.