Compatibility:
• Glock Gen 3-6 G17 17rd mags W/SP0536
• Glock Gen 3-6 G19 15rd mags W/SP0505
• CZ TS 20rd mag W/SP0312

Product Overview:
The Springer Precision extra power magazine spring for your magazines. The extra power spring is essential for reliability when adding any of our extensions to your magazines. For reliable performance, keep your magazine springs fresh.