Best CO2 Cartridges for Air Pistols: Reliable Power for Your Firearm
CO2 cartridges are the quickest and most reliable power source for many air pistols, BB guns, airsoft pistols, and related gear. This guide highlights five top choices, explains who they’re best for, and helps you compare compatibility and performance. Whether you’re a casual plinker, a competitive airsoft player, or a paintball enthusiast, these options cover common sizes, seals, and non-threaded or threaded designs to fit most setups.
Overview table: Selected products at a glance
- Umarex High-Grade CO2 Cartridges for Pellet Guns, BB Guns and Airsoft Guns, 12 Gram (Pack of 30)
- Umarex High-Grade CO2 Cartridges for Pellet Guns, BB Guns and Airsoft Guns
- Hawki CO2 12 gram Cartridges for Air Guns/Airsoft Pistols/Paintball Gun (5 Pack)
- Guard Dog Security 12 Gram Co2 Cartridges, Non-Threaded, Pack of 25
- Spozer 12g CO2 Cartridges – 25 Pack, Non-Threaded Snug Fit
Umarex High-Grade CO2 Cartridges, 12g (Pack of 30)

Brand: Umarex
- CO2 quality is critically important to the health of your air gun—ensures a lifetime of performance with clean CO2.
- Tested and proven clean; doesn’t dirty air gun valves.
- Number of rounds per capsule depends on your specific air gun.
Best for: Most casual shooters who want dependable power and clean gas. Limitations: The number of shots varies by weapon, so plan for different session lengths.
Umarex High-Grade CO2 Cartridges (Pack of 50)

Brand: Umarex
- Clean CO2 for long-term performance; avoids valve contamination.
- Clean, proven CO2 that won’t dirty air gun valves.
- Shot count per capsule depends on the gun model.
Best for: Higher-volume shooters or those stocking multiple pistols; avoid if your gun requires thread-specific cartridges not supported by all Umarex designs.
Hawki CO2 12g Cartridges (5 Pack)

Brand: Hawki
- MULTI-PACK: Includes a 5-pack of 12g cartridges for steady power on the go.
- UNIVERSAL COMPATIBILITY: Standard 12g design fits most airguns and paintball setups that use 12g CO2.
- CONSISTENT PRESSURE OUTPUT: Designed to maintain steady velocity and performance.
Best for: Buyers seeking a compact, economical pack for multiple sessions; caution: verify your gun’s compatibility with standard 12g cylinders.
Guard Dog Security 12 Gram CO2 Cartridges (Pack of 25)

Brand: Guard Dog Security
- CONSISTENT POWER DELIVERY: Suitable for rapid-fire sessions with stable pressure.
- UNIVERSALLY COMPATIBLE: Works with most CO2-powered airguns, pistols, or markers.
- LEAKPROOF & SAFE: Steel construction with a solid seal; oils or lubricants are not used.
Best for: Players needing reliable power across multiple platforms; limitation: non-threaded design may limit some gun compatibility.
Guard Dog Security 12 Gram CO2 Cartridges (Pack of 5)

Brand: Guard Dog Security
- CONSISTENT POWER DELIVERY: Delivers up to 30 shots with stable pressure.
- UNIVERSALLY COMPATIBLE: Fits most CO2-reliant guns and markers.
- LEAKPROOF & SAFE: Steel body and a tight seal reduce gas loss.
Best for: Quick-reload dailies or backup packs; choose this if you primarily shoot one pistol and want a compact option.
Buying Guide: CO2 Cartridges For Air Pistols
What size should you buy?
12-gram cartridges are the standard for most pistols and airsoft guns. They offer a balance of shot count and portability. If your gun model specifies a different size, use that exact cartridge to ensure proper fit and pressure.
Threaded vs non-threaded designs
Threaded designs screw into the gun’s reservoir, which can help with a snug seal in some models. Non-threaded cylinders push into place for quick reloads and faster action, but verify your gun accepts non-threaded CO2 cartridges before buying.
Compatibility and fit
Most 12g CO2 cartridges fit a wide range of airguns, airsoft pistols, paintball markers, and related gear. Always check your model’s manual or the product’s compatibility notes to avoid leaks or misfires.
Quality and cleanliness
Pure, clean CO2 helps extend valve life and maintains consistent velocity. Look for products marketed as “clean” or “high-grade” to reduce residue buildup in sensitive components.
Storage and safety
Store cartridges in a cool, dry place away from direct sunlight. Handle with care to avoid punctures or damage. Do not expose cartridges to high heat or impact to prevent gas release.
Practical buying tips
- Stock multiple brands if you shoot several gun types to ensure availability.
- Consider bulk packs if you shoot frequently to save on replacements.
- For beginners, start with a known-brand 30–50 count pack to ensure reliability across sessions.
FAQ
- Are CO2 cartridges universal for all airguns? Most are standard 12g designs, but always verify gun compatibility and cartridge threading.
- Can I use CO2 cartridges for paintball markers? Some markers are compatible, but always follow the manufacturer’s guidance.
- Do CO2 cartridges leak easily? Good quality cartridges with proper seals minimize leaks; store and handle correctly to reduce risk.
- What affects the number of shots per cartridge? The gun’s velocity setting, valve design, and temperature all influence shot count.
- Is non-threaded or threaded better? It depends on your gun’s design; non-threaded offers quick reloads, while threaded designs can seal more reliably in some models.