Umarex Steel Storm Magazine 2026 Top Picks for Quick Reloads

1

GoldenBall MK51 Bolt Action ZM51 Airsoft Sniper Magazine- Two Pack

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• ARS Mark

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  10.0
• Brand
  GoldenBall

Key specs2

Platform Match

Designed strictly as a direct replacement for the Goldenball 420 FPS MK51 bolt-action airsoft rifle.

Included Mag Count

2 magazines included

Pros & cons32

Pros

• Direct replacement fit for the Goldenball MK51 bolt-action sniper rifle
• Comes in a two-pack for continuous target shooting without stopping
• Holds 20 rounds per magazine for airsoft sniper practice

Cons

• Built for 6mm airsoft platforms and will not fit the Umarex Steel-Storm
• Manufacturer warranty explicitly does not cover this magazine

2

Umarex Komplete .177 Caliber 12-Shot Airgun Magazine

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  9.4
• Brand
  Umarex

Key specs2

Rifle Compatibility

Direct fit for the Umarex Komplete NCR .177 caliber PCP air rifle model 2251556.

Rotary Shot Count

12 rounds (.177 caliber)

Pros & cons32

Pros

• Direct factory fit for the Umarex Komplete NCR .177 PCP air rifle
• Holds 12 rounds of .177 caliber ammunition per clip
• Compact 1.5-inch square profile stores easily in shooting pouches

Cons

• Engineered for PCP rifles and incompatible with the Steel-Storm BB frame
• Does not house CO2 cartridges or feed steel BB reservoirs

3

Benjamin RC7710 Marauder/Armada .177-Caliber Auto-Indexing 10-Shot Pellet Magazine

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  9.0
• Brand
  Benjamin

Key specs2

Action Indexing

Auto-indexing 10-shot rotary

Intended Pellet Rifles

Built strictly for .177-caliber Benjamin Marauder and Armada multi-shot PCP air rifles.

Pros & cons32

Pros

• Auto-indexing design cycles 10 rounds smoothly on compatible rifles
• Designed specifically for .177 caliber Benjamin Marauder and Armada actions
• Dedicated pellet clip design prevents jams in compatible breech blocks

Cons

• Rotary pellet clip does not fit the Umarex Steel-Storm BB receiver
• Listing does not state exterior casing materials or warranty terms

4

Umarex .177 Caliber BB Gun Air Pistol Magazine (Pack of

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  8.8
• Brand
  Umarex

Key specs2

Handgun Compatibility

• Beretta Elite II
• Umarex XBG and TDP 45
• Umarex TAC
• Smith & Wesson M&P 40

Stick Magazine Capacity

19 rounds (.177 steel BBs)

Pros & cons32

Pros

• Includes two 19-round stick magazines for rapid handgun reloads
• Feeds standard .177 caliber steel BBs without manual rotary alignment
• Compatible across multiple pistols like the Beretta Elite II, XBG, and TDP 45

Cons

• Stick design lacks internal CO2 chambers and cannot seat in a Steel-Storm
• Does not fit rotary pellet rifles or larger reservoir loading ports

5

Elite Force Umarex 2279525 Airsoft Accessories Magazines

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  8.8
• Brand
  Elite Force

Key specs1

Airsoft Model Match

Elite Force part number 2279525 requires checking your specific airsoft gun model before purchase.

Pros & cons32

Pros

• Official Elite Force replacement magazine for designated airsoft guns
• Compact lightweight frame slips into standard gear pouches
• Factory part number 2279525 ensures exact airsoft equipment matching

Cons

• Airsoft accessory that does not fit .177 steel BB airguns like the Steel-Storm
• Listing omits specific model compatibility, capacity, and construction data

6

Umarex 10-Round .177 Caliber BB Magazine for NXG Compact Pump

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  8.6
• Brand
  Umarex

Key specs2

Shotgun Compatibility

Dedicated OEM magazine for the Umarex NXG Compact Pump Action .177 BB shotgun model 2251383.

Mag Capacity and Pack

10 rounds each (2-pack)

Pros & cons32

Pros

• Two-pack provides quick back-to-back reloads for target shooting
• Designed specifically for the Umarex NXG Compact pump-action BB shotgun
• Compact 2.7-inch magazine profile loads .177 caliber steel BBs easily

Cons

• Restricted to 10 rounds per magazine compared to higher-capacity stick mags
• Incompatible with the Steel-Storm receiver or dual-CO2 power systems

7

Umarex Steel-Storm .177 Caliber BB Gun Air Pistol , Black

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  8.2
• Brand
  Umarex

Key specs3

Powerplant and Mag Design

Drop-out magazine houses two 12-gram CO2 cartridges; Umarex-brand CO2 is recommended to maintain an airtight seal.

BB Capacity and Reservoir

30-shot magazine with 300-round reservoir

Firing Modes and Velocity

• Single-shot semi-automatic
• 6-round burst mode
• Up to 430 fps velocity

Pros & cons52

Pros

• Includes the full Steel-Storm gun featuring the dual 12g CO2 drop-out magazine
• Massive 300-round reserve reservoir keeps the 30-shot active mag full
• Offers both single-shot fire and rapid 6-round burst shooting modes
• Achieves muzzle velocity up to 430 fps with standard .177 steel BBs
• Integrated flip-up sights provide immediate target alignment out of the box

Cons

• Requires purchasing Umarex-brand CO2 separately to maintain warranty and seal
• Heavier total setup at 3.51 pounds compared to bare replacement magazines

8

GoldenBall X WE-Tech M1911 MEU Gas Blowback Single Stack 15

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  8.0
• Brand
  GoldenBall

Key specs2

Airsoft Pistol Match

Built exclusively for WE-Tech M1911 MEU series gas blowback airsoft handguns.

Single Stack Capacity

15 rounds (airsoft)

Pros & cons32

Pros

• Direct factory fit for WE-Tech M1911 MEU gas blowback airsoft pistols
• Single-stack design replicates authentic slim M1911 magazine dimensions
• Holds 15 rounds for tactical airsoft sidearm practice

Cons

• Built for 6mm airsoft gas blowback actions and unusable in the Steel-Storm
• Listing does not state green gas or CO2 valve specifications

9

Umarex Emerge Pellet Gun Air Rifle Magazine.177 Caliber, Black

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  7.8
• Brand
  Umarex

Key specs2

Pellet Rifle Match

Engineered specifically for the Umarex Emerge .177 caliber air rifle model 2251380.

Pellet Capacity and Weight

12 rounds (.177 pellets) at 0.05 lb

Pros & cons42

Pros

• Official manufacturer replacement for the Umarex Emerge .177 air rifle
• Ultra-lightweight design at just 0.05 pounds for unhindered rifle balance
• Houses 12 rounds of .177 caliber pellets for multi-shot shooting sessions
• Backed by an official manufacturer warranty for defect protection

Cons

• Designed for lead pellets and cannot feed steel BBs into a Steel-Storm
• Does not accommodate CO2 cartridges or high-capacity BB hoppers

10

Umarex Universal Steel BB Speed Loader for .177(4.5mm) Caliber Magazines

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  6.4
• Brand
  Umarex

Key specs2

Loading Mechanism

Feeds .177 caliber (4.5mm) steel BBs directly into magazine channels to cut reloading time.

Ammunition Fit

.177 caliber (4.5 mm) steel BBs

Pros & cons32

Pros

• Quickly loads standard .177 caliber (4.5mm) steel BB magazines
• Eliminates slow manual BB feeding during high-volume shooting sessions
• Universal design pairs with various Umarex steel BB magazine channels

Cons

• Loading accessory only and does not include a magazine body or CO2 housing
• Listing does not state total internal BB hopper capacity

11

GoldenBall KLI Airsoft Hicapa Baba Yaga 2 CO2 Blowback Airsoft

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  4.0
• Brand
  GoldenBall

Key specs2

CO2 Sealing Requirement

Operates via CO2 cartridges; Crosman-brand CO2 must be avoided as it fails to seal properly and risks magazine damage.

Baba Yaga Capacity

30 rounds (CO2 blowback)

Pros & cons43

Pros

• Direct OEM replacement magazine for KLI Airsoft Baba Yaga pistols
• Carries a generous 30-round capacity for extended airsoft skirmishes
• Integrated CO2 cartridge chamber delivers strong blowback cycling power
• Distinctive silver finish gives your pistol a custom look

Cons

• Incompatible with Crosman CO2 cartridges which fail to seal and cause damage
• Airsoft magazine that cannot fit or feed the Umarex Steel-Storm .177 BB gun
• Manufacturer warranty explicitly does not cover this magazine

12

GoldenBall X We Tech G17 CO2 Airsoft Pistol Magazine, Black

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  2.0
• Brand
  GoldenBall

Key specs2

Magazine Build Material

Heavy aluminum alloy

Sidearm Compatibility

Engineered specifically for WE-Tech G17 CO2 blowback airsoft handguns.

Pros & cons32

Pros

• Durable heavy aluminum alloy construction resists impact damage
• High-tension internal spring ensures positive, reliable BB feeding
• Houses a CO2 cartridge to power WE-Tech G17 airsoft blowback slides

Cons

• Dedicated to 6mm airsoft G17 replicas and will not seat in the Steel-Storm
• Listing does not disclose round capacity or warranty coverage details

Last update on 2026-09-19 / Affiliate links / Images, Product Titles, and Product Highlights from Amazon Product Advertising API

Does the Umarex Steel-Storm drop-out magazine house two 12-gram CO2 cartridges?

Yes, the Steel-Storm drop-out magazine is engineered specifically to hold two 12-gram CO2 cartridges at the same time. This twin-cartridge design delivers the pressure required to cycle the action and support multi-shot bursts. Single-cartridge pistol magazines cannot fit the chamber or supply the correct air volume, so always confirm that your carrier is built for dual 12-gram capsules before ordering.

Will standard Umarex pistol stick magazines fit into the Steel-Storm?

No, standard Umarex pistol magazines will not fit or feed in the Steel-Storm airgun. Stick-style magazines, such as the Umarex 19-shot .177 caliber BB magazine, are made exclusively for slim-grip handguns like the Umarex XBG, TDP 45, TAC, and Beretta Elite II. Replicas like the Umarex Legends M712 also rely on their own dedicated magazine platforms. The Steel-Storm uses a wide, proprietary drop-out block designed to seat its dual-cartridge power unit.

How do you ensure a proper CO2 seal in the magazine to avoid leaks?

To ensure an airtight seal and maintain reliable velocity, the manufacturer recommends using Umarex-brand CO2 cartridges. Position both 12-gram cartridges straight within the housing so the piercing pins make direct, centered contact with the capsule necks. Checking the puncturing points for debris and avoiding overtightening protects the internal O-rings from premature wear. When feeding rounds, pairing a snug seal with clean Umarex steel BBs prevents valve jamming during high-speed firing cycles in 2026.

Can a universal speed loader fill the 300-round BB reservoir?

Yes, you can use an external loading tool like the Umarex Universal Steel BB Speed Loader for .177 (4.5mm) caliber magazines to recharge the gun quickly. The Steel-Storm uses an internal 300-round reserve reservoir connected to an active 30-shot spring track. Using a compatible .177 speed loader allows you to pour BBs cleanly into the reservoir opening without dropping loose steel shot or having to feed individual rounds by hand.

Can rotary pellet clips or airsoft magazines work in the Steel-Storm?

No, the Steel-Storm is designed strictly for .177 caliber steel BBs and cannot accept pellet drums or airsoft hardware. Multi-shot rotary magazines like the 12-shot Umarex Komplete clip or the 10-round Umarex Emerge magazine are built specifically for lead pellets and will not clear the Steel-Storm frame. Similarly, airsoft magazines, including 6mm accessories for the KLI Baba Yaga or polymer GoldenBall MK51 platforms, have completely different external dimensions and will damage the breech if forced.

How does the 30-shot magazine track work with the 300-round reservoir?

The drop-out magazine block houses the twin CO2 source and feeds an active 30-shot capacity directly into the firing mechanism. The 300-round reservoir is a separate onboard storage compartment inside the receiver. Once the active 30-round spring-fed track runs dry, you engage the reservoir lock, tilt the muzzle downward, and shake the gun to drop another 30 BBs into the active channel without removing the CO2 carrier.