HK Army Aluminum HPA Paintball Tank – 13ci / 26ci / 48ci 3000 PSI Compressed Air System

HK Army Refillable HPA Paintball Tanks – 13ci / 26ci / 48ci 3000 PSI Compressed Air System

Reliable compressed air power in the size that fits your setup. The HK Army Aluminum HPA Paintball Tank is a refillable 3000 PSI compressed air system built for paintball players who want dependable air performance without the higher cost of carbon fiber tanks.

Choose from 13ci, 26ci, or 48ci size options depending on how compact, balanced, or high-capacity you want your marker setup to feel. Each tank includes a standard high-pressure regulator with approximately 800 PSI output, making it compatible with most paintball markers that run on compressed air.

Durable Aluminum Bottle • 3000 PSI Fill Rating • Standard 800 PSI Output

Authorized HK Army Dealer

Maddog Sports is an Authorized Dealer of HK Army Paintball products. When you buy HK Army air systems from Maddog, you are getting authentic gear backed by trusted paintball performance.

About HK Army Aluminum HPA Tanks

HK Army aluminum compressed air tanks are a great alternative to carbon fiber systems. They offer reliable refillable HPA performance, durable aluminum construction, and a standard high-pressure output regulator for everyday paintball use.

Choose Your Tank Size

• 13ci / 3000 PSI – Ultra-compact setup for magfed markers, pump markers, pistols, stock-style builds, and lightweight tactical play
• 26ci / 3000 PSI – Compact middle-ground option for magfed, scenario, and lightweight setups where you want more air than 13ci without moving to a full-size tank
• 48ci / 3000 PSI – Best all-around recreational size for most paintball markers, beginner setups, and weekend play

HK Army Aluminum Tank Size Guide

Not sure which HPA tank size is right for your setup? Here’s a quick breakdown of how the 13ci, 26ci, and 48ci systems compare in size, feel, and intended use.

Quick Recommendation: If this is your first HPA tank, go with the 48ci / 3000 PSI. If you want the lightest and most compact setup possible, choose the 13ci. The 26ci is the sweet spot for players wanting a compact setup with more usable air capacity.

Tank sizing and weight comparison shown in manufacturer reference guide. Actual dimensions may vary slightly.

Not sure which size to choose? Most new players should start with the 48ci / 3000 PSI. Choose 13ci or 26ci if you specifically want a smaller, more compact build.

Key Features

• Durable Aluminum Bottle – Rugged construction built for regular paintball use
• 3000 PSI Fill Rating – Standard aluminum compressed air pressure rating
• Approx. 800 PSI Output – Standard high-pressure regulator output for most paintball markers
• Integrated Fill Level Gauge – Easily monitor tank pressure
• Low-Profile Fill Nipple & Burst Disks – Clean, field-ready regulator layout
• Dual Burst Discs – Added safety protection built into the regulator system
• Tri-Label UN ISO Certification – Universal acceptance certification
• Flat Bottom Design – Stores upright on tables or staging areas
• 5-Year Hydro Stamp – Stamp indicates manufacture date and hydrostatic testing cycle

13ci vs 26ci vs 48ci – Which HPA Tank Is Right for You?

Reliable HPA Performance

Compressed air, also called HPA, is the preferred air source for many paintball players because it provides more consistent pressure than CO2 across changing temperatures and rates of fire.

• Works with most mechanical paintball markers
• Required or strongly recommended for most electronic paintball markers
• Refillable at paintball fields and air fill stations
• More consistent than CO2 for modern paintball setups

Estimated Shots Per Fill

Actual shot count depends on your marker efficiency, firing mode, temperature, regulator settings, and fill quality, but here are general estimates for most paintball setups:

• 13ci / 3000 PSI – Approx. 180–300 shots
  Compact capacity ideal for pistols, pump markers, magfed, and lightweight tactical builds
• 26ci / 3000 PSI – Approx. 350–550 shots
  Balanced compact setup with more usable air capacity for scenario and magfed play
• 48ci / 3000 PSI – Approx. 600–900 shots
  The most practical all-around option for recreational and beginner paintball setups

Pro Tip: If this is your first HPA tank and you are not specifically building a compact magfed or pistol setup, the 48ci / 3000 PSI is usually the best starting point.

Shot count estimates will vary depending on marker type, weather conditions, firing mode, regulator tuning, and air fill quality.

Important Tank Shipping Notice

All paintball tanks ship EMPTY to comply with DOT and carrier safety rules. Your tank must be filled before use at a paintball field, air station, or qualified compressed air fill location.

Do not attempt to fill this tank with a standard home air compressor. Paintball HPA tanks require high-pressure compressed air fill equipment rated for paintball air systems.

Find Local HPA Tank Filling Services 🗺️

In compliance with U.S. transportation regulations, ALL paintball tanks ship empty and must be filled before use.

Most players fill compressed air tanks at:

• Paintball fields
• Local paintball stores
• Sporting goods stores
• SCUBA and air service shops

Need help finding a fill station?
Use our HPA Fill Finder to locate nearby compressed air fill options before game day.

Find Local HPA Fills →

Always call ahead to confirm HPA pressure limits (3000 PSI / 4500 PSI) and fill availability.

How to Read Your Tank Hydro Date

Every paintball HPA tank includes a stamped manufacture or hydrostatic test date on the tank bottle. This date is commonly called the “hydro date.”

• Example: 03 ◇ 25 = Manufactured or tested in March 2025
• Aluminum HPA tanks typically require hydro testing every 5 years
• The stamped date is NOT the expiration date

Tanks that are out of hydro may not be filled by paintball fields or fill stations until they are re-tested.

Fresh hydro dates are guaranteed on all new Maddog HPA tanks. Expect tank dates within up to 1 year of their manufactured date.

Complete Your Paintball Air Setup

• Shop Paintball Guns
• Shop Paintball Gun Packages
• Shop Loaders & Hoppers
• Shop Paintballs
• Shop Harnesses & Pod Packs
• Shop Remote Coils

Need to Carry Your Tank on Your Back?

If you are using a tank-carry harness, pairing your HPA tank with a remote coil line can help move weight off your marker and improve comfort during longer games.

• Helps reduce front-heavy marker feel
• Improves comfort for woodsball and scenario play
• Works well with 4+1 and 6+1 harness systems

Maddog Pro Tip

For most beginner and recreational players, the 48ci / 3000 PSI is the safest choice. For compact magfed, pump, pistol, or tactical builds, the 13ci and 26ci options keep your setup smaller and easier to maneuver.

Fill Your Tank. Add Paint. GAME ON.

Frequently Asked Questions

Do HK Army HPA tanks ship filled?

No. All paintball tanks ship empty and must be filled before use.

What output pressure do these tanks use?

HK Army aluminum HPA tanks use a standard high-pressure regulator output of approximately 800 PSI.

Which size should I choose?

Choose 48ci for most beginner and recreational setups. Choose 26ci for a compact tactical or magfed setup. Choose 13ci for the smallest lightweight builds, pump markers, pistols, or stock-style play.

Will these tanks work with most paintball guns?

Yes. These tanks use standard paintball ASA threading and are compatible with most paintball markers designed to run on compressed air.

Are aluminum tanks better than carbon fiber tanks?

Aluminum tanks are more affordable and durable, making them great for beginners and recreational players. Carbon fiber tanks are lighter and hold more air for their size, but cost more.

What does the hydro date mean?

The hydro stamp indicates the tank’s manufacture or hydrostatic testing date. It is not the same as an immediate expiration date. Paintball tanks must be re-tested according to their required hydrostatic testing cycle.