ETS GLK1840 40-Round Extended Glock Magazine 9mm Clear Polymer

The ETS Group GLK1840 delivers exceptional capacity for Glock pistols with its 40-round extended design, providing significantly more firepower than standard 15-17 round magazines. This clear polymer magazine allows instant visual confirmation of remaining ammunition while maintaining the reliability expected from professional-grade components.

What Makes This Different

Unlike standard Glock magazines, the GLK1840 features translucent polymer construction that enables immediate round counting without removal from the firearm. The extended body design more than doubles standard capacity while maintaining proper feed geometry. Advanced polymer formulation resists impact damage and chemical exposure better than traditional materials, while the clear body won't yellow or crack under normal use conditions.

Key Features

• 40-round capacity provides 2.5x more ammunition than standard Glock 17 magazines
• Clear polymer body allows instant visual ammunition verification
• Compatible with Glock 17, 18, 19, 26, 34, and 45 pistol models
• Impact-resistant polymer construction withstands repeated drops and rough handling
• Standard Glock magazine catch interface ensures secure lock-up
• Extended baseplate provides improved grip purchase during reloads
• Chemical-resistant materials won't degrade from cleaning solvents or lubricants

Field performance demonstrates consistent feeding across various 9mm Luger ammunition weights and bullet profiles. The extended length requires modified draw techniques but provides substantial firepower advantage for competitive shooting, range training, and tactical applications. Temperature cycling from -20°F to 140°F shows minimal impact on spring tension or polymer flexibility.

Technical Specs

• Capacity: 40 rounds of 9mm Luger ammunition
• Material: High-impact clear polymer construction
• Compatibility: Glock 17, 18, 19, 26, 34, 45 pistols
• Overall length: Approximately 9.5 inches
• Weight: 4.2 ounces empty
• Spring: Heat-treated steel with anti-corrosion coating
• Country of origin: United States

The GLK1840 represents a practical solution for shooters requiring maximum ammunition capacity without compromising reliability. Extended magazines require practice to master handling characteristics, but the capacity advantage often outweighs the learning curve for serious applications.