12 Umarex Hammer 2 Shot Magazine Caliber of 2026 For Big Game Hunting

1

Umarex Rekt Jury 6-Dart Cylinders for The Jury Revolver, Pack

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• ARS Mark

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  10.0
• Brand
  Umarex

Key specs2

Dart Blaster Fit

REKT Jury Revolver only

Ammunition Requirement

Requires half-length foam darts, which must be purchased separately.

Pros & cons33

Pros

• Comes in a 2-pack for quick swapping during target games
• 6-shot capacity per cylinder matches REKT Jury revolver specs
• Lightweight build at 0.05 pounds makes carrying spares effortless

Cons

• Designed only for half-length foam darts and cannot feed airgun pellets
• Half-length foam darts are not included in the package
• Incompatible with big-bore hunting air rifles and the Umarex Hammer

2

Umarex Hammer 2-Shot Magazine for .50 Caliber PCP Pellet Gun

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  9.6
• Brand
  Umarex

Key specs3

Caliber Specification

.50 Caliber

Receiver Compatibility

Engineered strictly for the Umarex Hammer .50 caliber PCP air rifle to provide reliable feeding for big game hunting.

Round Capacity

2-Shot

Pros & cons32

Pros

• Genuine factory magazine engineered specifically for the .50 caliber Umarex Hammer
• Exact .50 caliber sizing ensures reliable feeding of heavy big-bore hunting slugs
• 2-shot capacity provides a dependable backup follow-up shot in the field

Cons

• Limited to 2 shots before requiring a manual reload or fresh magazine
• Only fits the Umarex Hammer PCP rifle and cannot be used in smaller PCP models

3

Umarex Komplete .22 Caliber 10-Shot Airgun Magazine

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  9.6
• Brand
  Umarex

Key specs2

Compatible Platform

Umarex Komplete NCR .22 (2251558)

Pellet Feeding

Holds 10 pellets in .22 caliber for small game and pest control with the Komplete NCR PCP rifle.

Pros & cons32

Pros

• 10-shot capacity delivers sustained shooting for pest control and target work
• Exact fit for the Umarex Komplete NCR .22 caliber PCP air rifle (item 2251558)
• Compact 1 x 1 x 1 inch dimensions fit easily in pocket or hunting pouch

Cons

• Sized only for .22 caliber pellets and will not chamber .50 caliber hunting slugs
• Incompatible with the Umarex Hammer big-bore PCP platform

4

Umarex Komplete .177 Caliber 12-Shot Airgun Magazine

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  9.6
• Brand
  Umarex

Key specs2

Pellet Capacity

12-Shot

Intended Rifle

Umarex Komplete NCR .177 (2251556)

Pros & cons32

Pros

• Generous 12-shot capacity maximizes shooting time between reloads
• Engineered specifically for the Umarex Komplete NCR .177 PCP air rifle
• Compact 1.5 x 0.5 x 1.5 inch profile is convenient to store in the field

Cons

• Restricted to .177 caliber pellets, making it unsuitable for big game hunting
• Does not fit the Umarex Hammer or any big-bore airgun receiver

5

Umarex Fusion 2 .177 Caliber Pellet Gun Air Rifle Magazine,

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  9.2
• Brand
  Umarex

Key specs2

Magazine Dimensions

5 x 0.5 x 3 inches

Rifle Suitability

Made specifically for the Umarex Fusion 2 rifle to feed 9 rounds of .177 caliber pellets.

Pros & cons42

Pros

• 9-round capacity offers plenty of shots for target practice and plinking
• Easy to load design simplifies handling during shooting sessions
• Weighs just 0.03 pounds for minimal gear weight
• Backed by a limited manufacturer warranty

Cons

• Compatible only with the Umarex Fusion 2 .177 caliber pellet rifle
• Cannot accommodate .50 caliber big-bore ammunition or fit the Hammer PCP

6

Gamo 10X GEN2 Quick-Shot magazine .22 Cal. (Swarm Fusion 10X

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  9.2
• Brand
  Gamo

Key specs2

Action Mechanism

10X GEN2 Horizontal Integration

Break Barrel Compatibility

Engineered exclusively for Gamo Swarm Fusion 10X GEN2 and Swarm Maxxim 10X GEN2 break-barrel air rifles.

Pros & cons32

Pros

• 10-shot capacity allows rapid shooting with zero manual reloads between shots
• Horizontal magazine integration creates a low-profile fit over the receiver
• Weighs only 0.07 pounds, adding minimal bulk to the airgun

Cons

• Fits only Gamo Swarm Fusion 10X GEN2 and Swarm Maxxim 10X GEN2 break barrels
• Sized for .22 caliber pellets and completely incompatible with Umarex PCP rifles

7

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

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  9.0
• Brand
  Benjamin

Key specs2

Indexing Type

Auto-Indexing 10-Shot

PCP Compatibility

Fits Benjamin Marauder and Armada air rifles in .177 caliber, but does not fit any Umarex receiver.

Pros & cons32

Pros

• Auto-indexing mechanism advances pellets smoothly with each bolt cycle
• 10-shot capacity supports extended target strings and small game pest control
• Direct factory fit for Benjamin Marauder and Armada air rifle platforms

Cons

• Sized exclusively for .177 caliber pellets
• Will not fit Umarex PCP rifles or the .50 caliber Hammer receiver

8

Umarex Gauntlet PCP Pellet Gun Air Rifle Magazine, .25 Caliber,

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  9.0
• Brand
  Umarex

Key specs2

Caliber Specification

.25 Caliber

Gauntlet Feeding

Provides an 8-shot capacity for the Umarex Gauntlet PCP air rifle using .25 caliber pellets.

Pros & cons32

Pros

• Dedicated factory magazine engineered for the Umarex Gauntlet PCP air rifle
• 8-shot capacity balances firepower with compact rotary dimensions
• Chambers .25 caliber pellets for medium game and predator control

Cons

• Sized for .25 caliber ammunition and cannot chamber .50 caliber big-bore slugs
• Receiver geometry will not seat inside the Umarex Hammer magazine well

9

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

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  8.8
• Brand
  Umarex

Key specs2

BB Capacity

19-Shot

Handgun Fit

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

Pros & cons42

Pros

• High 19-round capacity allows extended plinking without frequent reloading
• Included pack of 2 magazines doubles your loaded ammunition on the range
• Fits multiple .177 pistols including Beretta Elite II, XBG, and TDP 45
• Straightforward design makes loading steel BBs simple

Cons

• Designed only for .177 caliber steel BBs and cannot shoot lead pellets or slugs
• Pistol magazine format is completely incompatible with the Umarex Hammer PCP

10

Umarex Notos 7-Shot Rotary Magazine, Fits the Notos Carbine .22

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  8.8
• Brand
  Umarex

Key specs2

Carbine Compatibility

Designed strictly for the Umarex Notos .22 caliber PCP carbine to feed 7 pellets per cycle.

Rotary Capacity

7-Shot

Pros & cons32

Pros

• Factory rotary magazine designed specifically for the Umarex Notos PCP carbine
• 7-shot capacity is well-suited for small game hunting and backyard pest control
• Rotary design provides smooth cycling through the Notos sidelever action

Cons

• Accommodates .22 caliber pellets only
• Incompatible with the larger .50 caliber Umarex Hammer big-bore action

11

Elite Force Tactical Force 6XP 6mm BB Pistol Airsoft Gun,

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  8.6
• Brand
  Umarex

Key specs2

Airsoft Model Match

Tactical Force 6XP (2279706)

Ammunition Type

Feeds 6mm plastic airsoft BBs and cannot chamber airgun pellets or steel BBs.

Pros & cons32

Pros

• Factory spare magazine engineered for the Tactical Force 6XP CO2 pistol
• 15-shot capacity provides plenty of rounds for airsoft skirmishes and drills
• Extremely lightweight at 0.02 pounds for carrying multiple spares

Cons

• Feeds 6mm airsoft BBs only and cannot be used with pellets or steel BBs
• Built strictly for CO2 airsoft pistols, not big-bore hunting rifles

12

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

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  6.4
• Brand
  Umarex

Key specs2

Accessory Function

Functions as an external speed loader for .177 caliber (4.5mm) steel BB magazines rather than a standalone clip.

Caliber Fit

.177 (4.5mm) Steel BBs

Pros & cons32

Pros

• Universal design works across various .177 caliber (4.5mm) steel BB magazines
• Rapidly loads BB magazines to save time and finger strain at the range
• Direct factory accessory from Umarex for .177 caliber shooting platforms

Cons

• Serves only as a loading tool rather than an ammunition magazine
• Incompatible with lead hunting pellets, big-bore slugs, and .50 caliber rifles

Last update on 2026-10-11 / Affiliate links / Images, Product Titles, and Product Highlights from Amazon Product Advertising API

What caliber is the Umarex Hammer 2-shot magazine?

The Umarex Hammer 2-shot magazine is engineered strictly for .50 caliber projectiles in the Umarex Hammer PCP pellet gun air rifle. It does not fit or feed standard small-bore airgun ammunition like .177, .22, or .25 calibers. Big-bore hunting air rifles require substantial ammo dimensions to deliver clean shots on large game, so verifying the .50 caliber factory designation guarantees seamless cycling through the receiver.

What is the exact shot capacity of the factory Hammer magazine?

The factory magazine holds exactly 2 shots. It utilizes a straight, dual-chamber indexing layout engineered to handle heavy .50 caliber rounds under high-pressure pneumatic operation. When loaded into the Hammer, it provides an instant second shot for fast follow-up opportunities without having to manually feed loose ammunition into the breach.

Does the Umarex Hammer magazine fit other PCP rifles like the Gauntlet or Notos?

No, the Umarex Hammer magazine will not fit other Umarex PCP models like the Gauntlet or Notos. The Umarex Gauntlet uses a dedicated 8-shot rotary magazine in .25 caliber, while the Notos carbine relies on a 7-shot rotary magazine in .22 caliber. Each rifle platform features a unique receiver slot tailored specifically to its magazine profile and ammo diameter, meaning parts cannot be swapped between models.

How does the Hammer magazine compare to Umarex Komplete and Fusion magazines?

The Hammer magazine differs completely in size, caliber, and capacity compared to these small-bore alternatives. The Umarex Komplete NCR platform runs either a 10-shot magazine in .22 caliber or a 12-shot magazine in .177 caliber, and the Umarex Fusion 2 uses a dedicated .177 caliber pellet magazine. The Hammer 2-shot magazine is substantially larger to house .50 caliber ammunition, so small-bore magazines will neither latch nor cycle in the Hammer.

Can you shoot .177 or .22 pellets through an Umarex Hammer magazine?

No, you cannot load or shoot .177 or .22 pellets with an Umarex Hammer magazine. Its two chambers are machined specifically for .50 caliber ammunition, so smaller pellets will fall straight through or jam the mechanism. If you want a setup for target plinking or pest dispatch using .177 or .22 ammo, a dedicated tactical air rifle is the proper tool for those smaller calibers.

What is the best way to transport and store the Umarex Hammer and spare magazines?

Store your spare magazines empty and keep all .50 caliber ammunition protected from dirt, lint, and moisture before heading outdoors. Because big-bore PCP airguns generate significant energy designed for big game, keeping your rifle and equipment secured in a dedicated long gun safe protects the precision air components and prevents unauthorized handling. Always ensure the magazine is clear of the breech before locking the rifle away.