The Agency Arms G19 Compatible 9mm +5 magazine extension is designed for 15rd magazines (Will not work with 10rd magazines).

• Machined from 6061, Type 3 Hard Anodized
• Dot Matrix Panel for Marking
• Chrome Silicon Alloy Spring
• Increases capacity by 5 rounds (9mm), 4 rounds (.40s&w & .357sig)
• Extended Ledge for one-handed manipulations
• Compatible with the G19, 23, 33
• Made in the U.S.A.