Item #:
082442976648
UPC: #:
082442976648
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Beretta Px4 Storm 20-Round Magazine 9mm Luger Black Steel JM4PX920

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The Beretta JM4PX920 magazine delivers reliable feeding and extended capacity for Px4 Storm pistols. This factory-manufactured magazine maintains the same build quality and materials as the original equipment, ensuring consistent performance across thousands of rounds.

What Makes This Different

Factory Beretta magazines undergo rigorous quality control testing that aftermarket alternatives often skip. The precision-formed steel body resists deformation under pressure while the polymer follower reduces friction for smooth cycling. Unlike generic magazines, this unit features Beretta's proprietary spring tension calibrated specifically for the Px4 Storm's feeding geometry.

Key Features

  • 20-round capacity extends shooting sessions without frequent reloads
  • Black oxide finish on steel body prevents corrosion and reduces glare
  • High-impact polymer follower engineered for consistent cartridge presentation
  • Witness holes allow quick visual ammunition count verification
  • Compatible with all Beretta Px4 Storm pistol variants in 9mm Luger
  • Factory specifications ensure proper fit with existing holsters and magazine pouches
  • Removable floorplate simplifies cleaning and maintenance procedures
Competitive shooters benefit from the extended capacity during USPSA Production division matches, while law enforcement appreciates the additional rounds for duty carry. The steel construction maintains dimensional stability under temperature extremes from -20°F to 140°F. Independent testing shows consistent feeding with both 115-grain and 147-grain 9mm ammunition loads.

Technical Specs

  • Capacity: 20 rounds of 9mm Luger/.355 caliber
  • Body Material: Black oxide coated steel
  • Follower: High-impact polymer construction
  • Spring: Heat-treated carbon steel
  • Overall Length: Approximately 6.2 inches
  • Weight: 4.8 ounces empty
  • Compatibility: Beretta Px4 Storm pistols (9mm models only)
  • Manufacturer: Beretta USA
  • Country of Origin: United States
Factory magazines eliminate the feeding issues and dimensional variations common with aftermarket alternatives. Professional armorers recommend factory magazines for duty weapons where reliability cannot be compromised.