Includes:
1 x Extension and spring
Specifications:
• 21 rounds with the Full-Size 9mm 17rd mag with the extra power spring (Extends to the USPSA maximum 140mm)
• 19 rounds with the Compact 9mm 15rd mag with the extra power spring
• 21 rounds with the Full-Size 9mm 20rd mag with the extra power spring
• 17 rounds with the Full-Size .40cal 14rd mag with the extra power spring (Extends to the USPSA maximum 140mm)
Compatibility:
• PX4 Full-Size 9mm 17rd magazines
• PX4 Compact 9mm 15rd magazines
• PX4 Full-Size 9mm 20rd magazines
• PX4 SubCompact requires modification to work
• PX4 Full-Size .40cal 14rd magazines
• PX4 Compact .40cal 12rd magazine
• PX4 Full-Size .40cal 17rd magazine
