12 Umarex Hammer 50 Pcp of 2026 For Big-Bore Hunting

1

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

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  9.6
• Brand
  Umarex

Key specs3

Platform Compatibility

Umarex Hammer .50 PCP rifle only

Magazine Capacity

2-shot straight slide design

Action Role

Provides the exact factory feeding geometry required for cycling heavy .50 caliber hunting projectiles through the Umarex Hammer receiver.

Pros & cons42

Pros

• Genuine factory design built specifically for the Umarex Hammer .50 caliber PCP air rifle
• Dual-chamber magazine setup holds two full-size .50 caliber hunting slugs
• Slides directly into the Hammer action for quick follow-up shots in the field
• Dedicated rifle fit eliminates cycling issues caused by mismatched aftermarket trays

Cons

• Holds only two rounds per block before requiring a manual reload or swap
• Limited strictly to the Umarex Hammer PCP platform and will not fit other air rifles

2

Umarex ReadyAIR Gen 2 Portable High Pressure Air Compressor Pump

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  9.6
• Brand
  Umarex

Key specs2

Power Source Role

Dedicated high-pressure PCP compressor

Field Application

Fills large PCP air cylinders without manual pumping, making it suitable for running high-demand big-bore rifles between range strings.

Pros & cons43

Pros

• Supplies dedicated high-pressure air directly to high-capacity PCP air reservoirs
• Portable compressor configuration allows convenient recharging at home or hunting camp
• Built by Umarex to service demanding pre-charged pneumatic hunting airguns
• Eliminates physical fatigue associated with manual high-pressure hand pumps

Cons

• Requires access to an electrical power source to operate the motor
• Compressor operation generates mechanical noise during pressure cycles
• Listing does not state maximum fill PSI or shut-off pressure settings

3

Umarex T4E by P2P Paintball Gun Ammo, 10 Count, .50

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  9.4
• Brand
  Umarex

Key specs2

Projectile Caliber

.50 caliber spherical pepper round

Airgun Suitability

Intended exclusively for T4E paintball and training markers, not for rifled big-bore hunting rifles.

Pros & cons33

Pros

• Contains pepper powder payload engineered for defensive and training markers
• Standard .50 caliber round ball profile fits T4E series defensive airguns
• Lightweight frangible shell bursts upon target impact to release active agent

Cons

• Not compatible with the rifled barrel or high air pressure of the Hammer .50 PCP
• Fragile casing can rupture instantly if loaded into a high-powered PCP breech
• Limited pack size provides only 10 individual rounds

4

Umarex High-Grade CO2 Cartridges for Pellet Guns, BB Guns and

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  9.4
• Brand
  Umarex

Key specs2

Gas Source

12-gram clean CO2 capsules

Operating Powerplant

Designed for standard CO2 pistols and BB guns, completely incompatible with high-pressure pneumatic reservoirs.

Pros & cons33

Pros

• Clean gas formula avoids leaving residue on internal air gun valves
• Pack of 50 provides an ample power supply for small-caliber plinking guns
• Compact 12-gram size fits standard CO2 pistols and lightweight air rifles

Cons

• Cannot power the Umarex Hammer .50 PCP which requires high-pressure air
• CO2 pressure output drops significantly during rapid fire and cold weather
• Purchases are restricted to specific zip codes per distributor guidelines

5

Umarex High-Grade CO2 Cartridges for Pellet Guns, BB Guns and

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  9.4
• Brand
  Umarex

Key specs2

Cartridge Count

12 individual 12-gram capsules

Power Compatibility

Powers standard 12g CO2 target pistols and plinkers, not PCP hunting platforms.

Pros & cons33

Pros

• Small 12-pack provides an accessible count for occasional recreational shooters
• High-grade gas formulation prevents valve fouling in compatible airguns
• Standardized 12-gram shape fits popular CO2 BB and pellet airguns

Cons

• Totally incompatible with the pre-charged pneumatic system of the Hammer .50
• Delivers low pressure unsuitable for cycling big-bore hunting platforms
• Small pack size requires frequent repurchasing during regular shooting

6

Umarex High-Grade CO2 Cartridges for Pellet Guns, BB Guns and

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  9.4
• Brand
  Umarex

Key specs2

Supply Quantity

30 individual 12g cartridges

Reservoir Limitation

Functions only in low-pressure 12g CO2 actions, unable to charge or cycle big-bore PCP hunting rifles.

Pros & cons33

Pros

• 30-count pack balances overall supply volume with compact storage dimensions
• Clean manufacturing standards help protect sensitive rubber valve seals
• Universal fit across standard 12-gram CO2 air pistols and BB rifles

Cons

• Will not fit or pressurize the high-pressure cylinder of the Hammer .50 PCP
• Susceptible to velocity drop-offs when fired rapidly in outdoor conditions
• Subject to zip code delivery restrictions based on shipping regulations

7

100 Counts 50 Cal Solid Nylon Balls for Tr50/BP50/HDP50 Reusable

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  9.2
• Brand
  Lambid

Key specs2

Ball Construction

Hard solid nylon polymer

Marker Compatibility

Engineered for smoothbore T4E self-defense revolvers and training pistols rather than rifled PCP hunting barrels.

Pros & cons33

Pros

• Solid nylon construction resists cracking for repeated training sessions
• Sized specifically for .50 caliber defensive markers like TR50 and HDP50
• Pack of 100 projectiles allows extended target practice without constant recovery

Cons

• Spherical shape lacks the rifling engagement needed for the Hammer .50 barrel
• Light nylon projectile produces inadequate terminal energy for big-bore hunting
• Round ball geometry can lead to pressure loss or chamber jams in PCP actions

8

Timbocca 100pcs 50 Cal Ammo Balls for tr50, Solid Nylon

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  9.2
• Brand
  Timbocca

Key specs2

Ammunition Purpose

Defensive marker and training practice

Platform Fit

Matches T4E series training pistols and revolvers, completely incompatible with heavy-grain PCP hunting rifles.

Pros & cons33

Pros

• High-durability plastic stands up to multiple impacts during defensive drills
• Consistent round profile feeds reliably through TR50 and HDR50 revolving cylinders
• 100-piece quantity supports intensive marker practice at low consumable cost

Cons

• Not designed to engage rifling or withstand the chamber pressure of the Hammer
• Inadequate projectile weight and shape for humane big-bore game harvesting
• Listing does not provide exact ball diameter or individual grain weight

9

Alien Play 60 Pcs X .50 Cal Aluminum Balls for

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  8.8
• Brand
  Alien Play

Key specs2

Projectile Specifications

• 2.8 grams individual projectile weight
• 12.7 mm diameter aluminum alloy construction
• Protective black coated surface

Barrel Safety Warning

Feeding hard unlubricated aluminum balls into a high-pressure rifled airgun barrel can score rifling lands.

Pros & cons43

Pros

• Precision 2.8-gram aluminum alloy build delivers greater mass than nylon balls
• Seamless, uniform 12.7 mm spherical profile helps prevent chamber jams
• Black protective coating and rigid metal body allow reuse across thousands of shots
• High rigidity provides strong penetration against targets during defensive practice

Cons

• Underweight at 2.8 grams compared to proper 200-plus grain Hammer hunting slugs
• Hard metal sphere can cause excessive friction or damage in rifled air rifle barrels
• Short 1-month warranty coverage period from the manufacturer

10

ALIEN PLAY 150 X 50 Cal Aluminum Balls, Hard 50

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  8.8
• Brand
  Alien Play

Key specs2

Projectile Material

Mirror-polished aluminum alloy

Intended Platform

Engineered for T4E marker cylinders and defense pistols, not for high-energy big-bore hunting rifles.

Pros & cons43

Pros

• 150-count pack provides a substantial supply of reusable metal projectiles
• Polished mirror finish on aluminum surface ensures smooth feeding in marker clips
• 2.8-gram weight hits harder than standard rubber or plastic training balls
• Backed by a 1-year manufacturer warranty for material defects

Cons

• Spherical metal shape is unsuitable for the rifling and power of the Hammer .50 PCP
• Drastically lighter than authentic big-bore hunting slugs required for ethical game harvest
• Manufacturer spec table contains an apparent typo listing 127 mm size

11

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

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  8.8
• Brand
  Umarex

Key specs2

Caliber Restriction

.22 caliber pellets only

Rifle Model Fit

Designed specifically for the Umarex Notos PCP carbine, completely incompatible with .50 caliber Hammer receivers.

Pros & cons33

Pros

• Genuine Umarex factory rotary design ensures smooth pellet indexing
• 7-shot capacity delivers quick repeating fire for target shooting and small pests
• Compact rotary form factor integrates cleanly into the Notos receiver

Cons

• Chambered strictly for .22 caliber pellets and completely unusable in the .50 Hammer
• Rotary drum mechanism does not fit the Hammer straight slide magazine slot
• Pellet length is restricted by the internal depth of the rotary wheel

12

Umarex Primal 20 395-Grain .20 Caliber PCP Airgun Ammo, Pack

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  8.6
• Brand
  Umarex

Key specs2

Slug Mass

395 grains per projectile

Gun Model Fit

Manufactured for the Umarex Primal 20 platform and incompatible with the .50 caliber bore of the Hammer.

Pros & cons33

Pros

• Heavy 395-grain slug weight delivers substantial mass for big-game hunting
• Engineered specifically to handle the elevated pressures of PCP hunting guns
• Pack of 50 provides dedicated ammunition for sighting in and field hunts

Cons

• Sized specifically for .20 caliber / 20-gauge Primal barrels and will not fit .50 caliber bores
• Heavy slug profile creates significant drop over long-range trajectories
• Cannot chamber in standard .50 caliber Umarex Hammer magazine blocks

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

Will round .50 caliber defense balls work in the Umarex Hammer .50 PCP?

No. Round projectiles such as solid nylon balls, 2.8-gram aluminum defense balls, and T4E pepper rounds are made specifically for training markers and air pistols like the TR50, BP50, HDR50, and HDP50. They do not match the dimensions of the Umarex Hammer .50 caliber PCP pellet gun air rifle chamber and will not cycle through its 2-shot slide mechanism. Using plastic, rubber, or aluminum defense balls can cause feeding jams and air leaks. Always confirm that your ammunition is explicitly labeled for a .50 caliber PCP rifle before loading.

How do you fill the Umarex Hammer .50 PCP air cylinder?

You must fill the rifle using a dedicated high-pressure air source, such as the Umarex ReadyAIR Gen 2 Portable High Pressure Air Compressor Pump for PCP Air Rifles and Airguns. Standard hand pumps or shop air compressors cannot deliver the output required by PCP air reservoirs. If you already shoot a compact tactical air rifle, a portable high-pressure compressor gives you consistent fills at home or in the field. Always check your rifle manual to confirm the exact fill pressure limits before connecting any compressor.

Which magazine fits the Umarex Hammer .50 PCP air rifle?

The rifle requires the factory Umarex Hammer 2-Shot Magazine for .50 Caliber PCP Pellet Gun Air Rifles. This straight slide assembly is engineered specifically for the .50 caliber Hammer receiver and holds two rounds for quick follow-up shots. Generic clips, round paintball cylinders, and rotary magazines will not fit or index properly. Check the product listing to verify the exact model name before purchasing extra magazines.

Can you power the Umarex Hammer .50 PCP using 12-gram CO2 cartridges?

No. The Umarex Hammer .50 is a PCP platform that runs strictly on compressed air from a high-pressure reservoir, not CO2 gas. Umarex 12-gram CO2 cartridges (model 2211302) are made for CO2-powered BB guns, pellet pistols, and airsoft equipment to keep valves clean. Connecting CO2 to a big-bore PCP system will leave the rifle underpowered and unable to cycle. When organizing your airguns in a gun safe for scoped rifles, store your high-pressure PCP charging hardware separately from CO2 cartridges.

Will rotary magazines from other Umarex PCP models work in the Hammer?

No. Rotary magazines, such as the Umarex Notos 7-Shot Rotary Magazine, are made strictly for .22 caliber platforms like the Notos Carbine PCP pellet gun air rifle. The Hammer uses a specialized straight 2-shot slide built specifically for its .50 caliber chamber. Attempting to insert a rotary magazine into the Hammer receiver will cause mechanical jams and prevent the bolt from closing. Confirm that any replacement magazine is explicitly listed for the Hammer .50 caliber PCP rifle.

Can you shoot .20 caliber ammunition like the Umarex Primal 20 in the Hammer .50?

No. Ammunition such as the Umarex Primal 20 395-grain .20 caliber PCP airgun ammo is made strictly for .20 caliber airguns. Loading undersized .20 caliber ammunition into a .50 caliber barrel prevents a proper bore seal, causing severe air loss and erratic flight. Big-bore PCP air rifles require projectiles sized strictly to .50 caliber specifications. Always check the caliber marked on both the ammo box and your rifle barrel before shooting.