The ProMag GLKA21 extends your Glock's capacity to 20 rounds of 9mm ammunition, providing additional firepower when standard capacity restrictions don't apply. This steel-constructed magazine fits Glock models 17, 19, and 26, offering shooters increased round count for extended range sessions and competitive shooting.
What Makes This Different
Unlike polymer alternatives, the GLKA21 features all-steel construction with a heat-treated spring for consistent feeding pressure over thousands of cycles. The magazine body uses cold-rolled steel that resists deformation under pressure, while the follower design matches Glock's geometry for reliable cartridge presentation. This construction provides durability that exceeds many polymer extended magazines in high-volume shooting applications.Key Features
- 20-round capacity increases standard Glock magazine count by 5-9 rounds
- Heat-treated steel spring maintains tension through extended use cycles
- Cold-rolled steel body construction resists feed lip damage and deformation
- Compatible with Glock 17, 19, and 26 pistols in 9mm Luger
- Black oxide finish provides corrosion resistance and reduced glare
- Drop-free design ensures reliable magazine changes under stress
- Witness holes allow visual ammunition count verification
Technical Specs
- Capacity: 20 rounds of 9mm Luger/.380 ACP
- Construction: Cold-rolled steel body with steel spring
- Finish: Black oxide coating
- Compatibility: Glock 17, 19, 26 pistols
- Overall length: Approximately 6.2 inches
- Weight: 4.8 ounces empty
- Country of origin: United States
- Manufacturer warranty: Limited lifetime against defects
