Maddog CO2 Paintball Tank 591 ml Refillable Aluminium (Empty) — Lightweight, DOT/TC Certified

The Maddog 20 oz refillable aluminum CO2 tank is a lightweight, DOT/TC-certified empty bottle designed to power standard CO2 paintball markers.

This refillable 20 oz Maddog CO2 tank ships empty for safe transport and must be filled at a licensed CO2 service before use. Built from lightweight aluminum and fitted with an industry-standard repeater pin valve, the bottle balances portability with ample capacity—typically delivering roughly 800–1,000 shots per fill depending on marker setup, environmental conditions, and firing cadence. The cylinder carries a fresh date stamp (manufacture date) and meets DOT and TC certifications; it requires hydrostatic re-testing every five years to remain compliant.

How much shooting time will this 20 oz tank provide?

Shot count varies by marker type, shot rate, and ambient temperature. In everyday recreational play with a standard CO2 marker, expect approximately 800–1,000 shots per full 20 oz fill; aggressive firing or mechanical inefficiencies will reduce that number.

• Typical range: ~800–1,000 shots per fill for common markers
• Cold weather reduces effective shots per fill
• High-rate firing and leaks shorten runtime
• Marker tuning and efficiency improve shot count

Is this tank ready to use out of the box?

No—this Maddog tank ships empty to comply with transport rules. Before using the cylinder, take it to a certified CO2 refill station for charging and a safety check. Ensure the station observes proper filling pressures and connector compatibility for paintball use.

• Shipped empty—must be filled locally
• Fill at authorized CO2 or paintball service centers
• Verify repeater pin valve fit with your marker
• Follow all safety and transport guidelines when filling

What safety and maintenance requirements should I know?

The cylinder is DOT and TC certified and bears a manufacture date stamp; this date indicates when the tank was produced, not an expiration. The law requires a hydrostatic re-test every five years to confirm the tank’s structural integrity. Keep the valve capped when not in use and store tanks upright in a cool, dry place away from direct heat.

• DOT and TC certified with manufacture date stamp
• Hydrostatic testing required every 5 years
• Store upright, away from heat sources
• Keep valve protected and inspect for damage before filling

Will this tank fit my paintball marker?

The Maddog 20 oz tank uses a standard repeater pin valve intended for CO2-powered markers. It measures about 10.5 inches long by 3 inches wide and has an empty weight around 1.75 pounds—dimensions compatible with most paintball harnesses and marker mounts. Confirm your marker’s valve connection type and regulator requirements before purchase.

• Industry-standard repeater pin valve for compatibility
• Dimensions: ~10.5 in. L x 3 in. W
• Empty weight: ~1.75 lb for easy handling
• Fits most CO2 marker setups and harness systems

Who is this for? The Maddog 20 oz refillable CO2 tank suits recreational and scenario players who want a mid-size, portable bottle that’s easy to carry yet provides substantial shot capacity between fills. It’s also appropriate for field operators, backyard plinkers, and teams that prefer CO2 systems; buyers must plan to fill at an authorized CO2 service and keep up with five-year hydrostatic tests to maintain safe, legal use.